Revert of Wake Lock API implementation (Chromium part)

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 52f49b3de7c9bf0f7c3120182011c59282a1c8d0..a93eea7e70809ddf518856e59d4eeb4eb79a8e96 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -58,7 +58,6 @@
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/screen_orientation/screen_orientation_dispatcher_host_impl.h"
 #include "content/browser/site_instance_impl.h"
-#include "content/browser/wake_lock/wake_lock_service_context.h"
 #include "content/browser/web_contents/web_contents_view_guest.h"
 #include "content/browser/webui/generic_handler.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
@@ -413,8 +412,6 @@
 #if defined(ENABLE_BROWSER_CDMS)
   media_web_contents_observer_.reset(new MediaWebContentsObserver(this));
 #endif
-
-  wake_lock_service_context_.reset(new WakeLockServiceContext(this));
 }
 
 WebContentsImpl::~WebContentsImpl() {
@@ -2062,10 +2059,6 @@
   return geolocation_service_context_.get();
 }
 
-WakeLockServiceContext* WebContentsImpl::GetWakeLockServiceContext() {
-  return wake_lock_service_context_.get();
-}
-
 void WebContentsImpl::OnShowValidationMessage(
     const gfx::Rect& anchor_in_root_view,
     const base::string16& main_text,