scheduler: Move the Blink scheduler into Blink

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index daee7170916a6f19d73599d623067aec40007639..449d377c4fa273d4b16b431a8a984573cc509d33 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -58,6 +58,9 @@ class SyncMessageFilter;
 }
 
 namespace blink {
+namespace scheduler {
+class RenderWidgetSchedulingState;
+}
 struct WebDeviceEmulationParams;
 class WebFrameWidget;
 class WebGestureEvent;
@@ -76,10 +79,6 @@ namespace gfx {
 class Range;
 }
 
-namespace scheduler {
-class RenderWidgetSchedulingState;
-}
-
 namespace content {
 class CompositorDependencies;
 class ExternalPopupMenu;
@@ -773,7 +772,7 @@ class CONTENT_EXPORT RenderWidget
   bool has_host_context_menu_location_;
   gfx::Point host_context_menu_location_;
 
-  std::unique_ptr<scheduler::RenderWidgetSchedulingState>
+  std::unique_ptr<blink::scheduler::RenderWidgetSchedulingState>
       render_widget_scheduling_state_;
 
   // Mouse Lock dispatcher attached to this view.