Fix conflicts between accelerator keys and HTML DOM accesskeys....

chrome/browser/cocoa/chrome_event_processing_window.mm

 // Copyright (c) 2009 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/chrome_event_processing_window.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
 #import "chrome/browser/cocoa/browser_frame_view.h"
 #import "chrome/browser/cocoa/tab_strip_controller.h"
@@ skipping 69 matching lines @@
 
   // Handle per-window shortcuts like cmd-1, but do not handle browser-level
   // shortcuts like cmd-left (else, cmd-left would do history navigation even
   // if e.g. the Omnibox has focus). If the web has focus, don't do this here,
   // since the web needs to get a chance at swallowing the event first.
   if ([self handleExtraWindowKeyboardShortcut:event])
     return YES;
   return [super performKeyEquivalent:event];
 }
 
-- (void)redispatchEvent:(NSEvent*)event {
+- (BOOL)redispatchEvent:(NSEvent*)event {
   DCHECK(event);
   DCHECK([event window] == self);
+  eventHandled_ = YES;
   redispatchingEvent_ = YES;
   [NSApp sendEvent:event];
   redispatchingEvent_ = NO;
+
+  // If the event was not handled by [NSApp sendEvent:], the sendEvent:
+  // method below will be called, and because |redispatchingEvent_| is YES,
+  // |eventHandled_| will be set to NO.
+  return eventHandled_;
 }
 
 - (void)sendEvent:(NSEvent*)event {
   if (!redispatchingEvent_)
     [super sendEvent:event];
+  else
+    eventHandled_ = NO;
 }
 
 @end  // ChromeEventProcessingWindow