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

webkit/gpu/grcontext_for_webgraphicscontext3d.h

Index: webkit/gpu/grcontext_for_webgraphicscontext3d.h
diff --git a/webkit/gpu/grcontext_for_webgraphicscontext3d.h b/webkit/gpu/grcontext_for_webgraphicscontext3d.h
new file mode 100644
index 0000000000000000000000000000000000000000..76e63b10f1ac8530c986f0455ee84f6c2c946d4f
--- /dev/null
+++ b/webkit/gpu/grcontext_for_webgraphicscontext3d.h
@@ -0,0 +1,37 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_GPU_GRCONTEXT_FOR_WEBGRAPHICSCONTEXT3D_H_
+#define WEBKIT_GPU_GRCONTEXT_FOR_WEBGRAPHICSCONTEXT3D_H_
+
+#include "skia/ext/refptr.h"
+#include "webkit/gpu/webkit_gpu_export.h"
+
+class GrContext;
+namespace WebKit { class WebGraphicsContext3D; }
+
+namespace webkit {
+namespace gpu {
+
+// This class binds an offscreen GrContext to an offscreen context3d. The
+// context3d is used by the GrContext so must be valid as long as this class
+// is alive.
+class WEBKIT_GPU_EXPORT GrContextForWebGraphicsContext3D {
+ public:
+  explicit GrContextForWebGraphicsContext3D(
+      WebKit::WebGraphicsContext3D* context3d);
+  virtual ~GrContextForWebGraphicsContext3D();
+
+  GrContext* get() { return gr_context_.get(); }
+
+  void SetMemoryLimit(bool nonzero_allocation);
+
+ private:
+  skia::RefPtr<class GrContext> gr_context_;
+};
+
+}  // namespace gpu
+}  // namespace webkit
+
+#endif  // WEBKIT_GPU_GRCONTEXT_FOR_WEBGRAPHICSCONTEXT3D_H_