[Mac] Re-enable decoration tooltips in omnibox.

chrome/browser/cocoa/location_bar/autocomplete_text_field_cell.mm

 // 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.
 
 #import "chrome/browser/cocoa/location_bar/autocomplete_text_field_cell.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/image_utils.h"
 #import "chrome/browser/cocoa/location_bar/location_bar_decoration.h"
 
@@ skipping 669 matching lines @@
       return NO;
   }
 
   return YES;
 }
 
 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal {
   return NSDragOperationCopy;
 }
 
+- (void)updateToolTipsInRect:(NSRect)cellFrame
+                      ofView:(AutocompleteTextField*)controlView {
+  std::vector<LocationBarDecoration*> decorations;
+  std::vector<NSRect> decorationFrames;
+  NSRect textFrame;
+  CalculatePositionsInFrame(cellFrame, leftDecorations_, rightDecorations_,
+                            &decorations, &decorationFrames, &textFrame);
+
+  for (size_t i = 0; i < decorations.size(); ++i) {
+    NSString* tooltip = decorations[i]->GetToolTip();
+    if ([tooltip length] > 0)
+      [controlView addToolTip:tooltip forRect:decorationFrames[i]];
+  }
+}
+
 @end