Let every "accelerated IO surface swapped" message have an identifier of the surface.

chrome/browser/renderer_host/accelerated_surface_container_mac.h

Index: chrome/browser/renderer_host/accelerated_surface_container_mac.h
diff --git a/chrome/browser/renderer_host/accelerated_surface_container_mac.h b/chrome/browser/renderer_host/accelerated_surface_container_mac.h
index 04742f31e2c8cb0166551dd785837d3b0de92fa9..de6ceb857fae4fb8f4b7df9d5c3e9d0e395428a9 100644
--- a/chrome/browser/renderer_host/accelerated_surface_container_mac.h
+++ b/chrome/browser/renderer_host/accelerated_surface_container_mac.h
@@ -77,7 +77,7 @@ class AcceleratedSurfaceContainerMac {
   void ForceTextureReload() { texture_needs_upload_ = true; }
 
   // Notifies the surface that it was painted to.
-  void set_was_painted_to() { was_painted_to_ = true; }
+  void set_was_painted_to(uint64 surface_id);
 
   // Returns if the surface should be shown.
   bool should_be_visible() const { return visible_ && was_painted_to_; }
@@ -94,6 +94,9 @@ class AcceleratedSurfaceContainerMac {
   // IOSurfaceRef type when building on 10.5.
   base::mac::ScopedCFTypeRef<CFTypeRef> surface_;
 
+  // The id of |surface_|, or 0 if |surface_| is NULL.
+  uint64 surface_id_;
+
   // The TransportDIB which is used in pre-10.6 systems where the IOSurface
   // API is not supported.  This is a weak reference to the actual TransportDIB
   // whic is owned by the GPU process.