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

webkit/plugins/ppapi/ppb_scrollbar_impl.cc

Index: webkit/plugins/ppapi/ppb_scrollbar_impl.cc
===================================================================
--- webkit/plugins/ppapi/ppb_scrollbar_impl.cc	(revision 213350)
+++ webkit/plugins/ppapi/ppb_scrollbar_impl.cc	(working copy)
@@ -19,7 +19,7 @@
 #include "webkit/plugins/ppapi/common.h"
 #include "webkit/plugins/ppapi/event_conversion.h"
 #include "webkit/plugins/ppapi/plugin_module.h"
-#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance_impl.h"
 #include "webkit/plugins/ppapi/ppb_image_data_impl.h"
 #include "webkit/plugins/ppapi/resource_helper.h"
 
@@ -54,7 +54,7 @@
 }
 
 void PPB_Scrollbar_Impl::Init(bool vertical) {
-  PluginInstance* plugin_instance = ResourceHelper::GetPluginInstance(this);
+  PluginInstanceImpl* plugin_instance = ResourceHelper::GetPluginInstance(this);
   if (!plugin_instance)
     return;
   scrollbar_.reset(WebPluginScrollbar::createForPlugin(