Introduce FrameSinkManagerHost in content/browser/.

content/browser/renderer_host/compositor_impl_android.h

Index: content/browser/renderer_host/compositor_impl_android.h
diff --git a/content/browser/renderer_host/compositor_impl_android.h b/content/browser/renderer_host/compositor_impl_android.h
index 26e3ff519e43f48572052c678790d421390fafbf..19160a8c84cfb7c71c838a0c51c5543e08264783 100644
--- a/content/browser/renderer_host/compositor_impl_android.h
+++ b/content/browser/renderer_host/compositor_impl_android.h
@@ -44,6 +44,7 @@ class VulkanContextProvider;
 
 namespace content {
 class CompositorClient;
+class FrameSinkManagerHost;
 
 // -----------------------------------------------------------------------------
 // Browser-side compositor that manages a tree of content and UI layers.
@@ -61,6 +62,7 @@ class CONTENT_EXPORT CompositorImpl
   static bool IsInitialized();
 
   static cc::SurfaceManager* GetSurfaceManager();
+  static FrameSinkManagerHost* GetFrameSinkManagerHost();
   static cc::FrameSinkId AllocateFrameSinkId();
 
   // ui::ResourceProvider implementation.