[Mac] Move ScopedSendingEvent from content/common/mac to base/mac.

chrome/browser/chrome_browser_application_mac.mm

 // Copyright (c) 2011 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/chrome_browser_application_mac.h"
 
 #import "base/logging.h"
 #include "base/mac/crash_logging.h"
 #import "base/mac/scoped_nsexception_enabler.h"
 #import "base/metrics/histogram.h"
@@ skipping 351 matching lines @@
 
 - (void)addEventHook:(id<CrApplicationEventHookProtocol>)handler {
   [eventHooks_ addObject:handler];
 }
 
 - (void)removeEventHook:(id<CrApplicationEventHookProtocol>)handler {
   [eventHooks_ removeObject:handler];
 }
 
 - (void)sendEvent:(NSEvent*)event {
-  content::mac::ScopedSendingEvent sendingEventScoper;
+  base::mac::ScopedSendingEvent sendingEventScoper;
   for (id<CrApplicationEventHookProtocol> handler in eventHooks_.get()) {
     [handler hookForEvent:event];
   }
   [super sendEvent:event];
 }
 
 // NSExceptions which are caught by the event loop are logged here.
 // NSException uses setjmp/longjmp, which can be very bad for C++, so
 // we attempt to track and report them.
 - (void)reportException:(NSException *)anException {
@@ skipping 65 matching lines @@
         if (RenderViewHost* rvh = contents->render_view_host()) {
           rvh->EnableRendererAccessibility();
         }
       }
     }
   }
   return [super accessibilitySetValue:value forAttribute:attribute];
 }
 
 @end