Create a public API around webkit::ppapi::PluginInstance and use it in chrome. After this, webkit/p…

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
===================================================================
--- content/renderer/render_widget.h	(revision 213350)
+++ content/renderer/render_widget.h	(working copy)
@@ -66,7 +66,7 @@
 
 namespace webkit {
 namespace ppapi {
-class PluginInstance;
+class PluginInstanceImpl;
 }  // namespace ppapi
 }  // namespace webkit
 
@@ -381,7 +381,7 @@
   //
   // A return value of null means optimized painting can not be used and we
   // should continue with the normal painting code path.
-  virtual webkit::ppapi::PluginInstance* GetBitmapForOptimizedPluginPaint(
+  virtual webkit::ppapi::PluginInstanceImpl* GetBitmapForOptimizedPluginPaint(
       const gfx::Rect& paint_bounds,
       TransportDIB** dib,
       gfx::Rect* location,