Pepper takes ownership of a mailbox before passing it to the texture layer.

content/renderer/pepper/pepper_plugin_instance_impl.h

Index: content/renderer/pepper/pepper_plugin_instance_impl.h
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.h b/content/renderer/pepper/pepper_plugin_instance_impl.h
index da461798a5502d85b77b040a6e0bbc80c3ec0cb0..315381f011fd06e226866b1f32200a6e7aa8f6d8 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.h
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.h
@@ -24,6 +24,7 @@
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/texture_layer_client.h"
+#include "cc/resources/texture_mailbox.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/pepper_plugin_instance.h"
 #include "content/public/renderer/plugin_instance_throttler.h"
@@ -197,9 +198,17 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   // slow path can also be triggered if there is an overlapping frame.
   void ScrollRect(int dx, int dy, const gfx::Rect& rect);
 
-  // Commit the backing texture to the screen once the side effects some
-  // rendering up to an offscreen SwapBuffers are visible.
-  void CommitBackingTexture();
+  // Commit the texture mailbox to the screen.
+  void CommitTextureMailbox(const cc::TextureMailbox& texture_mailbox);
+
+  // Passes the committed texture to |texture_layer_| and marks it as in use.
+  void PassCommittedTextureToTextureLayer();
+
+  // Callback when the compositor is finished consuming the committed texture.
+  void FinishedConsumingCommittedTexture(
+      const cc::TextureMailbox& texture_mailbox,
+      const gpu::SyncToken& sync_token,
+      bool is_lost);
 
   // Called when the out-of-process plugin implementing this instance crashed.
   void InstanceCrashed();
@@ -933,6 +942,16 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   // The text that is currently selected in the plugin.
   base::string16 selected_text_;
 
+  // The most recently committed texture. This is kept around in case the layer
+  // needs to be regenerated.
+  cc::TextureMailbox committed_texture_;
+
+  // Whether the most recently committed texture is still in use by the
+  // compositor.
+  bool committed_texture_in_use_ = false;
+
+  gpu::SyncToken committed_texture_consumed_sync_token_;
+
   bool initialized_;
 
   // We use a weak ptr factory for scheduling DidChangeView events so that we