GuestView: Move Disable Drag and Drop Out to Chrome

chrome/browser/guest_view/guest_view_base.h

Index: chrome/browser/guest_view/guest_view_base.h
diff --git a/chrome/browser/guest_view/guest_view_base.h b/chrome/browser/guest_view/guest_view_base.h
index 2fd6acc53eb598e3887628c444e6c68013f7d894..79f0b3ff4569e7f791a5c5b780b502e966eec118 100644
--- a/chrome/browser/guest_view/guest_view_base.h
+++ b/chrome/browser/guest_view/guest_view_base.h
@@ -76,11 +76,20 @@ class GuestViewBase : public content::BrowserPluginGuestDelegate,
 
   virtual const char* GetViewType() const = 0;
 
+  // This method can be overriden by subclasses. This method is called when
+  // the initial set of frames within the page have completed loading.
+  virtual void DidStopLoading() {}
+
   // This method can be overridden by subclasses. It indicates that this guest's
   // embedder has been destroyed and the guest will be destroyed shortly. This
   // method gives derived classes the opportunity to perform some cleanup.
   virtual void EmbedderDestroyed() {}
 
+  // This method queries whether drag-and-drop is enabled for this particular
+  // view. By default, drag-and-drop is disabled. Derived classes can override
+  // this behavior to enable drag-and-drop.
+  virtual bool IsDragAndDropEnabled() const;
+
   bool IsViewType(const char* const view_type) const {
     return !strcmp(GetViewType(), view_type);
   }
@@ -135,6 +144,8 @@ class GuestViewBase : public content::BrowserPluginGuestDelegate,
   void SetOpener(GuestViewBase* opener);
 
   // WebContentsObserver implementation.
+  virtual void DidStopLoading(
+      content::RenderViewHost* render_view_host) OVERRIDE FINAL;
   virtual void WebContentsDestroyed() OVERRIDE;
 
   // WebContentsDelegate implementation.