Touch emulator: enables double tap support for pages similar to Chrome on Android.

content/content_browser.gypi

 # Copyright (c) 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../device/vibration/vibration.gyp:device_vibration',
     '../device/vibration/vibration.gyp:device_vibration_mojo_bindings',
@@ skipping 1005 matching lines @@
       'browser/renderer_host/delegated_frame_evictor.h',
       'browser/renderer_host/dip_util.cc',
       'browser/renderer_host/dip_util.h',
       'browser/renderer_host/display_link_mac.h',
       'browser/renderer_host/display_link_mac.cc',
       'browser/renderer_host/event_with_latency_info.h',
       'browser/renderer_host/file_utilities_message_filter.cc',
       'browser/renderer_host/file_utilities_message_filter.h',
       'browser/renderer_host/font_utils_linux.cc',
       'browser/renderer_host/font_utils_linux.h',
+      'browser/renderer_host/frame_metadata_util.cc',
+      'browser/renderer_host/frame_metadata_util.h',
       'browser/renderer_host/gamepad_browser_message_filter.cc',
       'browser/renderer_host/gamepad_browser_message_filter.h',
       'browser/renderer_host/gpu_message_filter.cc',
       'browser/renderer_host/gpu_message_filter.h',
       'browser/renderer_host/ime_adapter_android.cc',
       'browser/renderer_host/ime_adapter_android.h',
       'browser/renderer_host/input/gesture_event_queue.cc',
       'browser/renderer_host/input/gesture_event_queue.h',
       'browser/renderer_host/input/input_ack_handler.h',
       'browser/renderer_host/input/input_router.h',
@@ skipping 928 matching lines @@
         'browser/media/media_web_contents_observer.h',
       ],
     }],
     ['OS == "linux" and use_openssl==1', {
       'dependencies': [
         '../third_party/boringssl/boringssl.gyp:boringssl',
       ],
     }],
   ],
 }