cc: Route offscreen context creation for compositor to the browser.

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index 9e7c4d54496ee96db23b3253c0519a9e2c6d90a8..88734552804c989d120b5016945f8e7296b2f658 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -134,7 +134,9 @@ void ContextFactory::SetInstance(ContextFactory* instance) {
   g_context_factory = instance;
 }
 
-DefaultContextFactory::DefaultContextFactory() {
+DefaultContextFactory::DefaultContextFactory()
+    : main_thread_offscreen_context_(this, this),
+      compositor_thread_offscreen_context_(this, this) {
 }
 
 DefaultContextFactory::~DefaultContextFactory() {
@@ -163,6 +165,26 @@ WebKit::WebGraphicsContext3D* DefaultContextFactory::CreateOffscreenContext() {
   return CreateContextCommon(NULL, true);
 }
 
+WebKit::WebGraphicsContext3D* DefaultContextFactory::
+    OffscreenContextForMainThread() {
+  return main_thread_offscreen_context_.Context3d();
+}
+
+WebKit::WebGraphicsContext3D* DefaultContextFactory::
+    OffscreenContextForCompositorThread() {
+  return compositor_thread_offscreen_context_.Context3d();
+}
+
+GrContext* DefaultContextFactory::
+    OffscreenGrContextForMainThread() {
+  return main_thread_offscreen_context_.GrContext();
+}
+
+GrContext* DefaultContextFactory::
+    OffscreenGrContextForCompositorThread() {
+  return compositor_thread_offscreen_context_.GrContext();
+}
+
 void DefaultContextFactory::RemoveCompositor(Compositor* compositor) {
 }
 
@@ -521,6 +543,28 @@ scoped_ptr<cc::OutputSurface> Compositor::createOutputSurface() {
 void Compositor::didRecreateOutputSurface(bool success) {
 }
 
+WebKit::WebGraphicsContext3D*
+    Compositor::offscreenContext3dForMainThread() {
+  return ContextFactory::GetInstance()->
+      OffscreenContextForMainThread();
+}
+
+WebKit::WebGraphicsContext3D*
+    Compositor::offscreenContext3dForCompositorThread() {
+  return ContextFactory::GetInstance()->
+      OffscreenContextForCompositorThread();
+}
+
+GrContext* Compositor::offscreenGrContextForMainThread() {
+  return ContextFactory::GetInstance()->
+      OffscreenGrContextForMainThread();
+}
+
+GrContext* Compositor::offscreenGrContextForCompositorThread() {
+  return ContextFactory::GetInstance()->
+      OffscreenGrContextForCompositorThread();
+}
+
 scoped_ptr<cc::InputHandler> Compositor::createInputHandler() {
   return scoped_ptr<cc::InputHandler>();
 }