Move BrowserPluginDelegate's lifetime mgmt out of content/

content/renderer/browser_plugin/browser_plugin.h

Index: content/renderer/browser_plugin/browser_plugin.h
diff --git a/content/renderer/browser_plugin/browser_plugin.h b/content/renderer/browser_plugin/browser_plugin.h
index 379369790a512541dc2fc3277e46a1813d63c3f7..a2ca663dd831d8a732bc8f42ade940e0a4dddd64 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -55,8 +55,6 @@ class CONTENT_EXPORT BrowserPlugin :
   // A request to enable hardware compositing.
   void EnableCompositing(bool enable);
 
-  void UpdateInternalInstanceId();
-
   // Provided that a guest instance ID has been allocated, this method attaches
   // this BrowserPlugin instance to that guest.
   void Attach();
@@ -146,7 +144,8 @@ class CONTENT_EXPORT BrowserPlugin :
   // uniquely identifies a guest WebContents that's hosted by this
   // BrowserPlugin.
   BrowserPlugin(RenderFrame* render_frame,
-                scoped_ptr<BrowserPluginDelegate> delegate);
+                const std::string& mime_type,
+                const GURL& original_url);
 
   ~BrowserPlugin() override;
 
@@ -201,7 +200,11 @@ class CONTENT_EXPORT BrowserPlugin :
 
   std::vector<EditCommand> edit_commands_;
 
-  scoped_ptr<BrowserPluginDelegate> delegate_;
+  // Once set, ownership is transfered to our shadow root HTML element's GC.
+  BrowserPluginDelegate* delegate_;
+
+  const std::string mime_type_;
+  const GURL original_url_;
 
   // Weak factory used in v8 |MakeWeak| callback, since the v8 callback might
   // get called after BrowserPlugin has been destroyed.