Move TopSites api from c/b/history to c/b/e/api

chrome/chrome_browser.gypi

 # Copyright 2012 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2259 matching lines @@
           'sources!': [
             'browser/api/infobars/one_click_signin_infobar_delegate.cc',
             'browser/api/infobars/one_click_signin_infobar_delegate.h',
           ],
         }],
         ['enable_extensions==1', {
           'sources': [
             # Only extension API implementations should go here.
             'browser/accessibility/accessibility_extension_api.cc',
             'browser/accessibility/accessibility_extension_api.h',
-            'browser/history/top_sites_extension_api.cc',
-            'browser/history/top_sites_extension_api.h',
             'browser/infobars/infobar_extension_api.cc',
             'browser/infobars/infobar_extension_api.h',
             'browser/rlz/rlz_extension_api.cc',
             'browser/rlz/rlz_extension_api.h',
             'browser/speech/extension_api/tts_extension_api.cc',
             'browser/speech/extension_api/tts_extension_api.h',
             'browser/speech/extension_api/tts_engine_extension_api.cc',
             'browser/speech/extension_api/tts_engine_extension_api.h',
             'browser/speech/speech_input_extension_api.cc',
             'browser/speech/speech_input_extension_api.h',
@@ skipping 813 matching lines @@
             'proto_in_dir': '../third_party/cros_system_api/dbus',
             'proto_out_dir': 'chrome/browser/media_transfer_protocol',
           },
           'includes': ['../build/protoc.gypi'],
         },
       ],
      },
     ],
   ],
 }