diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ActionContext.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ActionContext.java
index 2b40954eec..5533313650 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ActionContext.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ActionContext.java
@@ -157,6 +157,14 @@ public class ActionContext extends JavaScriptObject {
     api.get(wrap(cb));
   }
 
+  /**
+   * The same as {@link #get(RestApi, JavaScriptObject)} but without converting
+   * a {@link NativeString} result to String.
+   */
+  static final void getRaw(RestApi api, final JavaScriptObject cb) {
+    api.get(wrapRaw(cb));
+  }
+
   static final void post(RestApi api, JavaScriptObject in, JavaScriptObject cb) {
     if (NativeString.is(in)) {
       post(api, ((NativeString) in).asString(), cb);
@@ -165,14 +173,42 @@ public class ActionContext extends JavaScriptObject {
     }
   }
 
+  /**
+   * The same as {@link #post(RestApi, JavaScriptObject, JavaScriptObject)} but
+   * without converting a {@link NativeString} result to String.
+   */
+  static final void postRaw(RestApi api, JavaScriptObject in, JavaScriptObject cb) {
+    if (NativeString.is(in)) {
+      postRaw(api, ((NativeString) in).asString(), cb);
+    } else {
+      api.post(in, wrapRaw(cb));
+    }
+  }
+
   static final void post(RestApi api, String in, JavaScriptObject cb) {
     api.post(in, wrap(cb));
   }
 
+  /**
+   * The same as {@link #post(RestApi, String, JavaScriptObject)} but without
+   * converting a {@link NativeString} result to String.
+   */
+  static final void postRaw(RestApi api, String in, JavaScriptObject cb) {
+    api.post(in, wrapRaw(cb));
+  }
+
   static final void put(RestApi api, JavaScriptObject cb) {
     api.put(wrap(cb));
   }
 
+  /**
+   * The same as {@link #put(RestApi, JavaScriptObject)} but without converting
+   * a {@link NativeString} result to String.
+   */
+  static final void putRaw(RestApi api, JavaScriptObject cb) {
+    api.put(wrapRaw(cb));
+  }
+
   static final void put(RestApi api, JavaScriptObject in, JavaScriptObject cb) {
     if (NativeString.is(in)) {
       put(api, ((NativeString) in).asString(), cb);
@@ -181,14 +217,42 @@ public class ActionContext extends JavaScriptObject {
     }
   }
 
+  /**
+   * The same as {@link #put(RestApi, JavaScriptObject, JavaScriptObject)} but
+   * without converting a {@link NativeString} result to String.
+   */
+  static final void putRaw(RestApi api, JavaScriptObject in, JavaScriptObject cb) {
+    if (NativeString.is(in)) {
+      putRaw(api, ((NativeString) in).asString(), cb);
+    } else {
+      api.put(in, wrapRaw(cb));
+    }
+  }
+
   static final void put(RestApi api, String in, JavaScriptObject cb) {
     api.put(in, wrap(cb));
   }
 
+  /**
+   * The same as {@link #put(RestApi, String, JavaScriptObject)} but without
+   * converting a {@link NativeString} result to String.
+   */
+  static final void putRaw(RestApi api, String in, JavaScriptObject cb) {
+    api.put(in, wrapRaw(cb));
+  }
+
   static final void delete(RestApi api, JavaScriptObject cb) {
     api.delete(wrap(cb));
   }
 
+  /**
+   * The same as {@link #delete(RestApi, JavaScriptObject)} but without
+   * converting a {@link NativeString} result to String.
+   */
+  static final void deleteRaw(RestApi api, JavaScriptObject cb) {
+    api.delete(wrapRaw(cb));
+  }
+
   private static GerritCallback<JavaScriptObject> wrap(final JavaScriptObject cb) {
     return new GerritCallback<JavaScriptObject>() {
       @Override
@@ -202,4 +266,13 @@ public class ActionContext extends JavaScriptObject {
       }
     };
   }
+
+  private static GerritCallback<JavaScriptObject> wrapRaw(final JavaScriptObject cb) {
+    return new GerritCallback<JavaScriptObject>() {
+      @Override
+      public void onSuccess(JavaScriptObject result) {
+        ApiGlue.invoke(cb, result);
+      }
+    };
+  }
 }
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ApiGlue.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ApiGlue.java
index b52efe8565..e4a5446f74 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ApiGlue.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/api/ApiGlue.java
@@ -102,6 +102,12 @@ public class ApiGlue {
             Lcom/google/gwt/core/client/JavaScriptObject;)
           (this._api(u), b);
       },
+      get_raw: function(u,b) {
+        @com.google.gerrit.client.api.ActionContext::getRaw(
+            Lcom/google/gerrit/client/rpc/RestApi;
+            Lcom/google/gwt/core/client/JavaScriptObject;)
+          (this._api(u), b);
+      },
       post: function(u,i,b) {
         if (typeof i == 'string') {
           @com.google.gerrit.client.api.ActionContext::post(
@@ -117,6 +123,21 @@ public class ApiGlue {
             (this._api(u), i, b);
         }
       },
+      post_raw: function(u,i,b) {
+        if (typeof i == 'string') {
+          @com.google.gerrit.client.api.ActionContext::postRaw(
+              Lcom/google/gerrit/client/rpc/RestApi;
+              Ljava/lang/String;
+              Lcom/google/gwt/core/client/JavaScriptObject;)
+            (this._api(u), i, b);
+        } else {
+          @com.google.gerrit.client.api.ActionContext::postRaw(
+              Lcom/google/gerrit/client/rpc/RestApi;
+              Lcom/google/gwt/core/client/JavaScriptObject;
+              Lcom/google/gwt/core/client/JavaScriptObject;)
+            (this._api(u), i, b);
+        }
+      },
       put: function(u,i,b) {
         if (b) {
           if (typeof i == 'string') {
@@ -139,6 +160,28 @@ public class ApiGlue {
             (this._api(u), i);
         }
       },
+      put_raw: function(u,i,b) {
+        if (b) {
+          if (typeof i == 'string') {
+            @com.google.gerrit.client.api.ActionContext::putRaw(
+                Lcom/google/gerrit/client/rpc/RestApi;
+                Ljava/lang/String;
+                Lcom/google/gwt/core/client/JavaScriptObject;)
+              (this._api(u), i, b);
+          } else {
+            @com.google.gerrit.client.api.ActionContext::putRaw(
+                Lcom/google/gerrit/client/rpc/RestApi;
+                Lcom/google/gwt/core/client/JavaScriptObject;
+                Lcom/google/gwt/core/client/JavaScriptObject;)
+              (this._api(u), i, b);
+          }
+        } else {
+          @com.google.gerrit.client.api.ActionContext::putRaw(
+              Lcom/google/gerrit/client/rpc/RestApi;
+              Lcom/google/gwt/core/client/JavaScriptObject;)
+            (this._api(u), i);
+        }
+      },
       'delete': function(u,b) {
         @com.google.gerrit.client.api.ActionContext::delete(
             Lcom/google/gerrit/client/rpc/RestApi;
@@ -151,6 +194,12 @@ public class ApiGlue {
             Lcom/google/gwt/core/client/JavaScriptObject;)
           (this._api(u), b);
       },
+      del_raw: function(u,b) {
+        @com.google.gerrit.client.api.ActionContext::deleteRaw(
+            Lcom/google/gerrit/client/rpc/RestApi;
+            Lcom/google/gwt/core/client/JavaScriptObject;)
+          (this._api(u), b);
+      },
     };
   }-*/;
 
diff --git a/gerrit-plugin-gwtui/src/main/java/com/google/gerrit/plugin/client/rpc/RestApi.java b/gerrit-plugin-gwtui/src/main/java/com/google/gerrit/plugin/client/rpc/RestApi.java
index 8b2a6b8786..8d408fb261 100644
--- a/gerrit-plugin-gwtui/src/main/java/com/google/gerrit/plugin/client/rpc/RestApi.java
+++ b/gerrit-plugin-gwtui/src/main/java/com/google/gerrit/plugin/client/rpc/RestApi.java
@@ -110,7 +110,7 @@ public class RestApi {
   }
 
   private static native void get(String p, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.get(p, r) }-*/;
+  /*-{ $wnd.Gerrit.get_raw(p, r) }-*/;
 
   public <T extends JavaScriptObject>
   void put(AsyncCallback<T> cb) {
@@ -118,7 +118,7 @@ public class RestApi {
   }
 
   private static native void put(String p, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.put(p, r) }-*/;
+  /*-{ $wnd.Gerrit.put_raw(p, r) }-*/;
 
   public <T extends JavaScriptObject>
   void put(String content, AsyncCallback<T> cb) {
@@ -127,7 +127,7 @@ public class RestApi {
 
   private static native
   void put(String p, String c, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.put(p, c, r) }-*/;
+  /*-{ $wnd.Gerrit.put_raw(p, c, r) }-*/;
 
   public <T extends JavaScriptObject>
   void put(JavaScriptObject content, AsyncCallback<T> cb) {
@@ -136,7 +136,7 @@ public class RestApi {
 
   private static native
   void put(String p, JavaScriptObject c, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.put(p, c, r) }-*/;
+  /*-{ $wnd.Gerrit.put_raw(p, c, r) }-*/;
 
   public <T extends JavaScriptObject>
   void post(String content, AsyncCallback<T> cb) {
@@ -145,7 +145,7 @@ public class RestApi {
 
   private static native
   void post(String p, String c, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.post(p, c, r) }-*/;
+  /*-{ $wnd.Gerrit.post_raw(p, c, r) }-*/;
 
   public <T extends JavaScriptObject>
   void post(JavaScriptObject content, AsyncCallback<T> cb) {
@@ -154,14 +154,14 @@ public class RestApi {
 
   private static native
   void post(String p, JavaScriptObject c, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.post(p, c, r) }-*/;
+  /*-{ $wnd.Gerrit.post_raw(p, c, r) }-*/;
 
   public void delete(AsyncCallback<NoContent> cb) {
     delete(path(), wrap(cb));
   }
 
   private static native void delete(String p, JavaScriptObject r)
-  /*-{ $wnd.Gerrit.del(p, r) }-*/;
+  /*-{ $wnd.Gerrit.del_raw(p, r) }-*/;
 
   private static native <T extends JavaScriptObject>
   JavaScriptObject wrap(AsyncCallback<T> b) /*-{