PPAPI NaCl Proxy: optimize PPB_Fullscreen::IsFullscreen.

ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.h

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.h
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.h	(revision 107024)
+++ ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.h	(working copy)
@@ -19,7 +19,9 @@
   static PluginInstanceData* FromPP(PP_Instance id);
   static void DidCreate(PP_Instance id);
   static void DidDestroy(PP_Instance id);
-  static void DidChangeView(PP_Instance id, PP_Rect position, PP_Rect clip);
+  static void DidChangeView(PP_Instance id, PP_Rect position, PP_Rect clip,
+                            bool is_fullscreen);
+  static bool IsFullscreen(PP_Instance id);
 
   PluginInstanceData(PP_Instance id)
     : id_(id), position_(PP_MakeRectFromXYWH(0, 0, 0, 0)) {
@@ -28,13 +30,14 @@
 
   PP_Instance id() { return id_; }
   PP_Rect position() { return position_; }
-  void set_position(PP_Rect position) { position_ = position; }
+  bool is_fullscreen() { return is_fullscreen_; }
 
  private:
   NACL_DISALLOW_COPY_AND_ASSIGN(PluginInstanceData);
 
   PP_Instance id_;
   PP_Rect position_;
+  bool is_fullscreen_;
 };
 
 }  // namespace ppapi_proxy