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

cc/resource_provider.h

Index: cc/resource_provider.h
diff --git a/cc/resource_provider.h b/cc/resource_provider.h
index ead62a375e82b647bd79ba792e5150463bfeed3a..74593fb5b0237bd978a85481aff4989e3f3790bb 100644
--- a/cc/resource_provider.h
+++ b/cc/resource_provider.h
@@ -15,6 +15,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "cc/cc_export.h"
+#include "cc/grcontext_provider.h"
 #include "cc/output_surface.h"
 #include "cc/texture_copier.h"
 #include "cc/texture_mailbox.h"
@@ -34,7 +35,6 @@ class Vector2d;
 }
 
 namespace cc {
-
 class TextureUploader;
 
 // This class is not thread-safe and can only be called from the thread it was
@@ -261,6 +261,9 @@ public:
     // Indicates if we can currently lock this resource for write.
     bool canLockForWrite(ResourceId);
 
+    GrContextProvider* grContextProvider() { return &m_grContextProvider; }
+    void setContext3dForGrContext(WebKit::WebGraphicsContext3D* context3d);
+
 private:
     struct Resource {
         Resource();
@@ -332,6 +335,8 @@ private:
     int m_maxTextureSize;
     GLenum m_bestTextureFormat;
 
+    GrContextProvider m_grContextProvider;
+
     base::ThreadChecker m_threadChecker;
 
     scoped_refptr<Fence> m_currentReadLockFence;