Create Mojo service for locking/unlocking screen orientation.

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 7ff5d88b6bc37deb890dabdbe4d1fa26604a8f85..c6434d80bbf0eba44b1de5db2c3645d512cc0528 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -48,7 +48,7 @@
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #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/screen_orientation/screen_orientation_context.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/web_contents/web_contents_view_guest.h"
 #include "content/browser/webui/generic_handler.h"
@@ -77,7 +77,6 @@
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_widget_host_iterator.h"
 #include "content/public/browser/resource_request_details.h"
-#include "content/public/browser/screen_orientation_dispatcher_host.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents_delegate.h"
@@ -1203,8 +1202,7 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
   geolocation_dispatcher_host_.reset(new GeolocationDispatcherHost(this));
   midi_dispatcher_host_.reset(new MidiDispatcherHost(this));
 
-  screen_orientation_dispatcher_host_.reset(
-      new ScreenOrientationDispatcherHostImpl(this));
+  screen_orientation_context_.reset(new ScreenOrientationContext());
 
 #if defined(OS_ANDROID)
   date_time_chooser_.reset(new DateTimeChooserAndroid());