Mojo-ify implementation of screen orientation locking/unlocking.

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 9842629f07d345d10fe57c671e7576deb343bfdd..e2982a4ba11941121dd443b2d99cb89ac3e3d708 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -69,7 +69,6 @@
 #include "content/browser/renderer_host/render_widget_host_input_event_router.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/text_input_manager.h"
-#include "content/browser/screen_orientation/screen_orientation_dispatcher_host_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/web_contents/web_contents_view_child_frame.h"
 #include "content/browser/web_contents/web_contents_view_guest.h"
@@ -102,7 +101,7 @@
 #include "content/public/browser/notification_types.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/screen_orientation_provider.h"
 #include "content/public/browser/security_style_explanations.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/user_metrics.h"
@@ -465,6 +464,7 @@ WebContentsImpl::WebContentsImpl(BrowserContext* browser_context)
   wake_lock_service_context_.reset(new device::WakeLockServiceContext(
       BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE),
       base::Bind(&WebContentsImpl::GetNativeView, base::Unretained(this))));
+  screen_orientation_provider_.reset(new ScreenOrientationProvider(this));
 }
 
 WebContentsImpl::~WebContentsImpl() {
@@ -1613,9 +1613,6 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
                  NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
                  NotificationService::AllBrowserContextsAndSources());
 
-  screen_orientation_dispatcher_host_.reset(
-      new ScreenOrientationDispatcherHostImpl(this));
-
   manifest_manager_host_.reset(new ManifestManagerHost(this));
 
 #if defined(OS_ANDROID)
@@ -2428,6 +2425,10 @@ device::WakeLockServiceContext* WebContentsImpl::GetWakeLockServiceContext() {
   return wake_lock_service_context_.get();
 }
 
+ScreenOrientationProvider* WebContentsImpl::GetScreenOrientationProvider() {
+  return screen_orientation_provider_.get();
+}
+
 void WebContentsImpl::OnShowValidationMessage(
     const gfx::Rect& anchor_in_root_view,
     const base::string16& main_text,