Mojo-ify implementation of screen orientation locking/unlocking.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index ac12b2649be4ee7be55a128da4cba7668c3946e4..53dacd1903f48c02a0a0ee2a26a08e461211a0c5 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -52,6 +52,7 @@
 #include "content/browser/renderer_host/render_widget_host_delegate.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_service_impl.h"
 #include "content/browser/shared_worker/shared_worker_service_impl.h"
 #include "content/browser/websockets/websocket_manager.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
@@ -2247,6 +2248,14 @@ void RenderFrameHostImpl::RegisterMojoInterfaces() {
   }
 #endif
 
+  ScreenOrientationProvider* screen_orientation_provider =
+      delegate_ ? delegate_->GetScreenOrientationProvider() : nullptr;
+  if (screen_orientation_provider) {
+    GetInterfaceRegistry()->AddInterface(
+        base::Bind(&ScreenOrientationServiceImpl::Create,
+                   base::Unretained(screen_orientation_provider)));
+  }
+
   GetContentClient()->browser()->RegisterRenderFrameMojoInterfaces(
       GetInterfaceRegistry(), this);
 }