Pepper: Cache the document URL in PepperPluginInstanceImpl

content/renderer/pepper/pepper_plugin_instance_impl.h

Index: content/renderer/pepper/pepper_plugin_instance_impl.h
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.h b/content/renderer/pepper/pepper_plugin_instance_impl.h
index 6de1847861a371487d89c8f16d2d35486ed772a9..f77bd04651241f1b9cca990a59b06a0ef5f0be52 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.h
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.h
@@ -171,6 +171,8 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   // Returns true if Delete() has been called on this object.
   bool is_deleted() const;
 
+  GURL document_url() const { return document_url_; }
+
   // Paints the current backing store to the web page.
   void Paint(blink::WebCanvas* canvas,
              const gfx::Rect& plugin_rect,
@@ -722,6 +724,8 @@ class CONTENT_EXPORT PepperPluginInstanceImpl
   // Plugin URL.
   const GURL plugin_url_;
 
+  GURL document_url_;
+
   // Used to track Flash-specific metrics.
   const bool is_flash_plugin_;