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

base/mac/scoped_sending_event_unittest.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 "content/common/mac/scoped_sending_event.h"
+#import "base/mac/scoped_sending_event.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // Sets the flag within scope, resets when leaving scope.
 TEST(ScopedSendingEventTest, SetHandlingSendEvent) {
   id<CrAppProtocol> app = NSApp;
   EXPECT_FALSE([app isHandlingSendEvent]);
   {
-    content::mac::ScopedSendingEvent is_handling_send_event;
+    base::mac::ScopedSendingEvent is_handling_send_event;
     EXPECT_TRUE([app isHandlingSendEvent]);
   }
   EXPECT_FALSE([app isHandlingSendEvent]);
 }
 
 // Nested call restores previous value rather than resetting flag.
 TEST(ScopedSendingEventTest, NestedSetHandlingSendEvent) {
   id<CrAppProtocol> app = NSApp;
   EXPECT_FALSE([app isHandlingSendEvent]);
   {
-    content::mac::ScopedSendingEvent is_handling_send_event;
+    base::mac::ScopedSendingEvent is_handling_send_event;
     EXPECT_TRUE([app isHandlingSendEvent]);
     {
-      content::mac::ScopedSendingEvent nested_is_handling_send_event;
+      base::mac::ScopedSendingEvent nested_is_handling_send_event;
       EXPECT_TRUE([app isHandlingSendEvent]);
     }
     EXPECT_TRUE([app isHandlingSendEvent]);
   }
   EXPECT_FALSE([app isHandlingSendEvent]);
 }
 
 }  // namespace