MacViews: Anchor bubbles according to the MD spec.

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

 // Copyright (c) 2010 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.
 
 #include <vector>
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/styled_text_field_cell.h"
@@ skipping 47 matching lines @@
 - (void)addLeftDecoration:(LocationBarDecoration*)decoration;
 
 // Add a new right-side decoration to the left of the existing
 // right-side decorations.
 - (void)addRightDecoration:(LocationBarDecoration*)decoration;
 
 // The width available after accounting for decorations.
 - (CGFloat)availableWidthInFrame:(const NSRect)frame;
 
 // Return the frame for |aDecoration| if the cell is in |cellFrame|.
-// Returns |NSZeroRect| for decorations which are not currently
-// visible.
+// Returns |NSZeroRect| for decorations which are not currently visible.
 - (NSRect)frameForDecoration:(const LocationBarDecoration*)aDecoration
                      inFrame:(NSRect)cellFrame;
 
+// Returns the frame representing the background of |decoration|. Also sets
+// |isLeftDecoration| according to whether the decoration appears on the left or
+// the right side of the text field.
+- (NSRect)backgroundFrameForDecoration:(LocationBarDecoration*)decoration
+                               inFrame:(NSRect)cellFrame
+                      isLeftDecoration:(BOOL*)isLeftDecoration;
+
 // Returns true if it's okay to drop dragged data into the view at the
 // given location.
 - (BOOL)canDropAtLocationInWindow:(NSPoint)location
                            ofView:(AutocompleteTextField*)controlView;
 
 // Find the decoration under the location in the window. Return |NULL| if
 // there's nothing in the location.
 - (LocationBarDecoration*)decorationForLocationInWindow:(NSPoint)location
                                                  inRect:(NSRect)cellFrame
                                                  ofView:(AutocompleteTextField*)
@@ skipping 46 matching lines @@
                   ofView:(AutocompleteTextField*)controlView;
 @end
 
 // Methods which are either only for testing, or only public for testing.
 @interface AutocompleteTextFieldCell (TestingAPI)
 
 // Returns |mouseTrackingDecorations_|.
 - (const std::vector<LocationBarDecoration*>&)mouseTrackingDecorations;
 
 @end