Changed our tooltips for the editor tabs to the path of the files being edited.

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/htmleditor/HtmlFileEditor.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/htmleditor/HtmlFileEditor.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/htmleditor/HtmlFileEditor.java	(revision 1624)
+++ editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/htmleditor/HtmlFileEditor.java	(working copy)
@@ -1,11 +1,11 @@
 /*
  * Copyright (c) 2011, the Dart project authors.
- *
+ * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
- *
+ * 
  * http://www.eclipse.org/legal/epl-v10.html
- *
+ * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  * or implied. See the License for the specific language governing permissions and limitations under
@@ -14,6 +14,7 @@
 package com.google.dart.tools.ui.internal.htmleditor;
 
 import org.eclipse.jface.action.IMenuManager;
+import org.eclipse.ui.IFileEditorInput;
 import org.eclipse.ui.editors.text.TextEditor;
 import org.eclipse.ui.texteditor.ITextEditorActionConstants;
 
@@ -33,6 +34,19 @@
   }
 
   @Override
+  public String getTitleToolTip() {
+    if (getEditorInput() instanceof IFileEditorInput) {
+      IFileEditorInput input = (IFileEditorInput) getEditorInput();
+
+      if (input.getFile().getLocation() != null) {
+        return input.getFile().getLocation().toFile().toString();
+      }
+    }
+
+    return super.getTitleToolTip();
+  }
+
+  @Override
   protected void editorContextMenuAboutToShow(IMenuManager menu) {
     // Cut/Copy/Paste actions..
     addAction(menu, ITextEditorActionConstants.UNDO);
@@ -58,4 +72,5 @@
     // Remove the Preferences menu item
     menu.remove(ITextEditorActionConstants.RULER_PREFERENCES);
   }
+
 }