Fix: The file column's left border does't appear.

In Unified view the left border line of patch content
is lost.

This commit fixed it.

Change-Id: I9e874fa8a85373e71bc26a8f298c39b0b805a896

gerrit-gwtui/src/main/java/com/google/gerrit/client/GerritCss.java

@@ -189,6 +189,7 @@ public interface GerritCss extends CssResource {
   String sectionHeader();
   String sideBySideScreenLinkTable();
   String sideBySideScreenSideBySideTable();
+  String unifiedTable();
   String singleLine();
   String skipLine();
   String smallHeading();

gerrit-gwtui/src/main/java/com/google/gerrit/client/gerrit.css

@@ -1048,6 +1048,13 @@ a:hover.downloadLink {
   padding-left: 0px;
 }
 
+/** UnifiedScreen **/
+.unifiedTable {
+  width: 100%;
+  border: 1px solid #B0BDCC;
+  display: table;
+}
+
 /** SideBySideScreen **/
 .sideBySideScreenSideBySideTable {
   width: 100%;

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

@@ -330,8 +330,13 @@ public abstract class PatchScreen extends Screen implements
 
     add(topNav);
     contentPanel = new FlowPanel();
-    contentPanel.setStyleName(Gerrit.RESOURCES.css()
+    if (getPatchScreenType() == PatchScreen.Type.SIDE_BY_SIDE) {
-        .sideBySideScreenSideBySideTable());
+      contentPanel.setStyleName(//
+          Gerrit.RESOURCES.css().sideBySideScreenSideBySideTable());
+    } else {
+      contentPanel.setStyleName(Gerrit.RESOURCES.css().unifiedTable());
+    }
+
     contentPanel.add(header);
     contentPanel.add(noDifference);
     contentPanel.add(contentTable);

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

@@ -274,6 +274,7 @@ public class UnifiedDiffTable extends AbstractPatchContentTable {
     padLineNumberForSideB(m);
 
     m.openTd();
+    m.setStyleName(Gerrit.RESOURCES.css().fileLine());
     m.addStyleName(Gerrit.RESOURCES.css().diffText());
     m.addStyleName(Gerrit.RESOURCES.css().diffTextFileHeader());
     m.append(line);
@@ -287,6 +288,7 @@ public class UnifiedDiffTable extends AbstractPatchContentTable {
     padLineNumberForSideB(m);
 
     m.openTd();
+    m.setStyleName(Gerrit.RESOURCES.css().fileLine());
     m.addStyleName(Gerrit.RESOURCES.css().diffText());
     m.addStyleName(Gerrit.RESOURCES.css().diffTextHunkHeader());
     m.append("@@ -");
@@ -324,6 +326,7 @@ public class UnifiedDiffTable extends AbstractPatchContentTable {
       final SparseHtmlFile src, final int i) {
     final SafeHtml text = src.getSafeHtmlLine(i);
     m.openTd();
+    m.setStyleName(Gerrit.RESOURCES.css().fileLine());
     m.addStyleName(Gerrit.RESOURCES.css().diffText());
     switch (type) {
       case CONTEXT: