Fix compiler warnings about missing switch cases for PatchLine.Type

Add explicit case statements for all enumeration values to
prevent compiler warnings.

Change-Id: Ia7d31b9d2559f564eee6b6692fd224a683089831

gerrit-gwtui/src/main/java/com/google/gerrit/client/patches/AbstractPatchContentTable.java

@@ -295,6 +295,8 @@ public abstract class AbstractPatchContentTable extends NavigationTable<Object>
         case INSERT:
         case REPLACE:
           return true;
+        case CONTEXT:
+          break;
       }
     } else if (o instanceof CommentList) {
       return true;

gerrit-gwtui/src/main/java/com/google/gerrit/client/patches/SideBySideTable.java

@@ -593,6 +593,8 @@ public class SideBySideTable extends AbstractPatchContentTable {
           m.addStyleName("wdi");
         }
         break;
+      case REPLACE:
+        break;
     }
     m.append(lineHtml);
     m.closeTd();

gerrit-gwtui/src/main/java/com/google/gerrit/client/patches/UnifiedDiffTable.java

@@ -70,6 +70,8 @@ public class UnifiedDiffTable extends AbstractPatchContentTable {
         case INSERT:
           createCommentEditor(row + 1, PC, pl.getLineB(), (short) 1);
           break;
+        case REPLACE:
+          break;
       }
     }
   }
@@ -159,6 +161,8 @@ public class UnifiedDiffTable extends AbstractPatchContentTable {
       case INSERT:
         createCommentEditor(row + 1, PC, pl.getLineB(), (short) 1);
         break;
+      case REPLACE:
+        break;
     }
   }
 
@@ -537,6 +541,8 @@ public class UnifiedDiffTable extends AbstractPatchContentTable {
         m.append("+");
         m.append(text);
         break;
+      case REPLACE:
+        break;
     }
     m.closeTd();
   }