Add a PepperHelper::EnablePepperSupportForChannel function to content.

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': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../net/net.gyp:net',
@@ skipping 89 matching lines @@
     'public/browser/notification_details.h',
     'public/browser/notification_observer.h',
     'public/browser/notification_registrar.cc',
     'public/browser/notification_registrar.h',
     'public/browser/notification_service.h',
     'public/browser/notification_source.h',
     'public/browser/notification_types.h',
     'public/browser/page_navigator.cc',
     'public/browser/page_navigator.h',
     'public/browser/pepper_flash_settings_helper.h',
+    'public/browser/pepper_helper.h',
     'public/browser/plugin_data_remover.h',
     'public/browser/plugin_service_filter.h',
     'public/browser/plugin_service.h',
     'public/browser/profiler_controller.h',
     'public/browser/profiler_subscriber.h',
     'public/browser/quota_permission_context.h',
     'public/browser/render_process_host.h',
     'public/browser/render_process_host_factory.h',
     'public/browser/render_view_host.h',
     'public/browser/render_view_host_observer.cc',
@@ skipping 351 matching lines @@
     'browser/net/browser_online_state_observer.cc',
     'browser/net/browser_online_state_observer.h',
     'browser/net/view_blob_internals_job_factory.cc',
     'browser/net/view_blob_internals_job_factory.h',
     'browser/net/view_http_cache_job_factory.cc',
     'browser/net/view_http_cache_job_factory.h',
     'browser/notification_service_impl.cc',
     'browser/notification_service_impl.h',
     'browser/pepper_flash_settings_helper_impl.cc',
     'browser/pepper_flash_settings_helper_impl.h',
+    'browser/pepper_helper.cc',
     'browser/plugin_data_remover_impl.cc',
     'browser/plugin_data_remover_impl.h',
     'browser/plugin_loader_posix.cc',
     'browser/plugin_loader_posix.h',
     'browser/plugin_process_host.cc',
     'browser/plugin_process_host.h',
     'browser/plugin_process_host_mac.cc',
     'browser/plugin_service_impl.cc',
     'browser/plugin_service_impl.h',
     'browser/power_save_blocker_android.cc',
@@ skipping 550 matching lines @@
         ['include', '^public/browser/notification_registrar\\.cc$'],
         ['include', '^public/browser/speech_recognition_'],
         ['include', '^browser/notification_service_impl\\.cc$'],
         # Pull in all but one file from speech.
         ['include', '^browser/speech/'],
         ['exclude', '^browser/speech/input_tag_speech_dispatcher_host\\.cc$$'],
       ],
     }],
   ],
 }