3D Compositing in <browser>, first draft.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index e0e3c52ffd6abf3a5120f14f4b4c6dd605dff45a..1c6db99c437a5dd0f95a0694e7febf1be388d55b 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -205,7 +205,8 @@ class RenderWidgetHostViewAura::ResizeLock
 // RenderWidgetHostViewAura, public:
 
 RenderWidgetHostViewAura::RenderWidgetHostViewAura(RenderWidgetHost* host)
-    : host_(RenderWidgetHostImpl::From(host)),
+    : RenderWidgetHostViewBase(CompositingDelegateAura(this)),
+      host_(RenderWidgetHostImpl::From(host)),
       ALLOW_THIS_IN_INITIALIZER_LIST(window_(new aura::Window(this))),
       in_shutdown_(false),
       is_fullscreen_(false),
@@ -687,16 +688,6 @@ void RenderWidgetHostViewAura::SetScrollOffsetPinning(
   // Not needed. Mac-only.
 }
 
-gfx::GLSurfaceHandle RenderWidgetHostViewAura::GetCompositingSurface() {
-  ui::Compositor* compositor = GetCompositor();
-  if (shared_surface_handle_.is_null() && compositor) {
-    ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
-    shared_surface_handle_ = factory->CreateSharedSurfaceHandle(compositor);
-    factory->AddObserver(this);
-  }
-  return shared_surface_handle_;
-}
-
 bool RenderWidgetHostViewAura::LockMouse() {
   aura::RootWindow* root_window = window_->GetRootWindow();
   if (!root_window)
@@ -1420,3 +1411,23 @@ void content::RenderWidgetHostViewPort::GetDefaultScreenInfo(
     WebKit::WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
+
+////////////////////////////////////////////////////////////////////////////////
+// CompositingDelegateAura, public:
+
+gfx::GLSurfaceHandle
+RenderWidgetHostViewAura::CompositingDelegateAura::GetCompositingSurface() {
+  ui::Compositor* compositor = view_->GetCompositor();
+  if (view_->shared_surface_handle_.is_null() && compositor) {
+    ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
+    view_shared_surface_handle_ =
+        factory->CreateSharedSurfaceHandle(compositor);
+    factory->AddObserver(view_);
+  }
+  return view_shared_surface_handle_;
+}
+
+bool
+renderWidgetHostViewAura::CompositingDelegateAura::ResizeNeedsNewSurface() {
+  return false;
+}