Mailbox support for texture layers.

cc/resource_provider.h

Index: cc/resource_provider.h
diff --git a/cc/resource_provider.h b/cc/resource_provider.h
index d90d2244340edfdc731913b8505f1dde6c5e4005..82685349f1895d29646ceec00110b544af2b7038 100644
--- a/cc/resource_provider.h
+++ b/cc/resource_provider.h
@@ -18,6 +18,7 @@
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/size.h"
 #include <deque>
+#include <string>
 #include <vector>
 
 namespace WebKit {
@@ -82,6 +83,9 @@ public:
     // Wraps an external texture into a GL resource.
     ResourceId createResourceFromExternalTexture(unsigned textureId);
 
+    // Wraps an external texture mailbox into a GL resource.
+    ResourceId createResourceFromTextureMailbox(const std::string& mailboxName);
+
     void deleteResource(ResourceId);
 
     // Update pixels from image, copying sourceRect (in image) into destRect (in the resource).