Move BroadcastChannel browser code from components/ to content/browser.

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',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
     '../components/components.gyp:memory_coordinator_browser',
     '../components/leveldb/leveldb.gyp:leveldb_lib',
     '../components/link_header_util/link_header_util.gyp:link_header_util',
     '../components/mime_util/mime_util.gyp:mime_util',
     '../components/scheduler/scheduler.gyp:scheduler_common',
     '../components/url_formatter/url_formatter.gyp:url_formatter',
-    '../components/components.gyp:webmessaging',
     '../crypto/crypto.gyp:crypto',
     '../device/battery/battery.gyp:device_battery',
     '../device/battery/battery.gyp:device_battery_mojo_bindings',
     '../device/bluetooth/bluetooth.gyp:device_bluetooth',
     '../device/gamepad/gamepad.gyp:device_gamepad',
     '../device/usb/usb.gyp:device_usb',
     '../device/power_save_blocker/power_save_blocker.gyp:device_power_save_blocker',
     '../device/vibration/vibration.gyp:device_vibration',
     '../device/vibration/vibration.gyp:device_vibration_mojo_bindings',
     '../gin/gin.gyp:gin',
@@ skipping 469 matching lines @@
       'browser/bluetooth/bluetooth_device_chooser_controller.h',
       'browser/bluetooth/bluetooth_metrics.cc',
       'browser/bluetooth/bluetooth_metrics.h',
       'browser/bluetooth/cache_query_result.h',
       'browser/bluetooth/frame_connected_bluetooth_devices.cc',
       'browser/bluetooth/frame_connected_bluetooth_devices.h',
       'browser/bluetooth/web_bluetooth_service_impl.cc',
       'browser/bluetooth/web_bluetooth_service_impl.h',
       'browser/bootstrap_sandbox_manager_mac.cc',
       'browser/bootstrap_sandbox_manager_mac.h',
+      'browser/broadcast_channel/broadcast_channel_provider.cc',
+      'browser/broadcast_channel/broadcast_channel_provider.h',
       'browser/browser_child_process_host_impl.cc',
       'browser/browser_child_process_host_impl.h',
       'browser/browser_context.cc',
       'browser/browser_ipc_logging.cc',
       'browser/browser_main.cc',
       'browser/browser_main.h',
       'browser/browser_main_loop.cc',
       'browser/browser_main_loop.h',
       'browser/browser_main_runner.cc',
       'browser/browser_plugin/browser_plugin_embedder.cc',
@@ skipping 1650 matching lines @@
       ],
     }],
     ['OS != "mac" and OS != "android"', {
       'sources!': [
         'browser/gpu/gpu_surface_tracker.cc',
         'browser/gpu/gpu_surface_tracker.h',
       ],
     }],
   ],
 }