cc: Refactor ResourceProvider.

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index 18f4e18ea96a347d43e7f667f2af1da430c3e038..e30750103716f7f64aff5869b3eff1f714aeb3d9 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -25,6 +25,7 @@
 #include "cc/trees/blocking_task_runner.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_impl.h"
+#include "gpu/command_buffer/client/gles2_interface.h"
 #include "ui/gfx/frame_time.h"
 
 namespace {
@@ -1273,8 +1274,10 @@ void ThreadProxy::InitializeOutputSurfaceOnImplThread(
 void ThreadProxy::FinishGLOnImplThread(CompletionEvent* completion) {
   TRACE_EVENT0("cc", "ThreadProxy::FinishGLOnImplThread");
   DCHECK(IsImplThread());
-  if (impl().layer_tree_host_impl->resource_provider())
-    impl().layer_tree_host_impl->resource_provider()->Finish();
+  ContextProvider* context_provider =
+      impl().layer_tree_host_impl->output_surface()->context_provider();

[danakj, 2014/07/14 16:29:19]

Oh, I think you need to null-check the OutputSurface too, it could be NULL and
you'd crash then (sorry).

[sohanjg, 2014/07/14 16:44:47]

Done.
No problem :)

+  if (context_provider)
+    context_provider->ContextGL()->Finish();
   completion->Signal();
 }