Inform webkit when PPAPI plugin contents are opaque.

webkit/plugins/ppapi/ppapi_plugin_instance.h

 // Copyright (c) 2012 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_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_
 #define WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 420 matching lines @@
   // null if the context is not 2D.
   PPB_Graphics2D_Impl* GetBoundGraphics2D() const;
 
   // Get the bound 3D graphics context.
   // Returns NULL if bound graphics is not a 3D context.
   PPB_Graphics3D_Impl* GetBoundGraphics3D() const;
 
   // Sets the id of the texture that the plugin draws to. The id is in the
   // compositor space so it can use it to composite with rest of the page.
   // A value of zero indicates the plugin is not backed by a texture.
-  void setBackingTextureId(unsigned int id);
+  // isOpaque is true if the plugin contents are always opaque.
+  void setBackingTextureId(unsigned int id, bool isOpaque);

[piman, 2012/03/06 01:40:56]

style nit: isOpaque -> is_opaque (also in implementation)

 
   // Internal helper function for PrintPage().
   bool PrintPageHelper(PP_PrintPageNumberRange_Dev* page_ranges,
                        int num_ranges,
                        WebKit::WebCanvas* canvas);
 
   void DoSetCursor(WebKit::WebCursorInfo* cursor);
 
   // Internal helper functions for HandleCompositionXXX().
   bool SendCompositionEventToPlugin(
@@ skipping 167 matching lines @@
 
   PP_CompletionCallback lock_mouse_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstance);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPAPI_PLUGIN_INSTANCE_H_