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

webkit/plugins/ppapi/plugin_object.h

Index: webkit/plugins/ppapi/plugin_object.h
===================================================================
--- webkit/plugins/ppapi/plugin_object.h	(revision 213350)
+++ webkit/plugins/ppapi/plugin_object.h	(working copy)
@@ -17,7 +17,7 @@
 namespace webkit {
 namespace ppapi {
 
-class PluginInstance;
+class PluginInstanceImpl;
 
 // A PluginObject is a JS-accessible object implemented by the plugin.
 //
@@ -29,11 +29,11 @@
 
   // Allocates a new PluginObject and returns it as a PP_Var with a
   // refcount of 1.
-  static PP_Var Create(PluginInstance* instance,
+  static PP_Var Create(PluginInstanceImpl* instance,
                        const PPP_Class_Deprecated* ppp_class,
                        void* ppp_class_data);
 
-  PluginInstance* instance() const { return instance_; }
+  PluginInstanceImpl* instance() const { return instance_; }
 
   const PPP_Class_Deprecated* ppp_class() { return ppp_class_; }
   void* ppp_class_data() { return ppp_class_data_; };
@@ -68,12 +68,12 @@
   //
   // The NPObjectWrapper (an NPObject) should already have the reference
   // incremented on it, and this class will take ownership of that reference.
-  PluginObject(PluginInstance* instance,
+  PluginObject(PluginInstanceImpl* instance,
                NPObjectWrapper* object_wrapper,
                const PPP_Class_Deprecated* ppp_class,
                void* ppp_class_data);
 
-  PluginInstance* instance_;
+  PluginInstanceImpl* instance_;
 
   // Holds a pointer to the NPObject wrapper backing the var. This class
   // derives from NPObject and we hold a reference to it, so it must be