MacViews: Anchor bubbles according to the MD spec.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
@@ skipping 224 matching lines @@
     return decorationFrames[index];
   }
 
   // Decorations which are not visible should have been filtered out
   // at the top, but return |NSZeroRect| rather than a 0-width rect
   // for consistency.
   NOTREACHED();
   return NSZeroRect;
 }
 
+- (NSRect)backgroundFrameForDecoration:(LocationBarDecoration*)decoration
+                               inFrame:(NSRect)cellFrame
+                      isLeftDecoration:(BOOL*)isLeftDecoration {
+  NSRect decorationFrame =
+      [self frameForDecoration:decoration inFrame:cellFrame];
+  *isLeftDecoration =
+      std::find(leftDecorations_.begin(), leftDecorations_.end(), decoration) !=
+      leftDecorations_.end();
+  return decoration->GetBackgroundFrame(decorationFrame);
+}
+
 // Overriden to account for the decorations.
 - (NSRect)textFrameForFrame:(NSRect)cellFrame {
   // Get the frame adjusted for decorations.
   std::vector<LocationBarDecoration*> decorations;
   std::vector<NSRect> decorationFrames;
   NSRect textFrame = [super textFrameForFrame:cellFrame];
   CalculatePositionsInFrame(textFrame, leftDecorations_, rightDecorations_,
                             &decorations, &decorationFrames, &textFrame);
 
   // The text needs to be slightly higher than its default position to match the
@@ skipping 439 matching lines @@
 
 @end
 
 @implementation AutocompleteTextFieldCell (TestingAPI)
 
 - (const std::vector<LocationBarDecoration*>&)mouseTrackingDecorations {
   return mouseTrackingDecorations_;
 }
 
 @end