Disable download for overlay panel content

content/public/browser/web_contents.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 701 matching lines @@
   // SSLStatus to record the sensitive input field, so that embedders
   // can adjust the UI if desired.
   virtual void OnPasswordInputShownOnHttp() = 0;
 
   // Called when the WebContents has displayed a credit card field on an
   // HTTP page. This method modifies the appropriate NavigationEntry's
   // SSLStatus to record the sensitive input field, so that embedders
   // can adjust the UI if desired.
   virtual void OnCreditCardInputShownOnHttp() = 0;
 
+  // Sets whether the WebContents is for overlaying content on a page.
+  virtual void SetIsOverlayContent(bool is_overlay_content) = 0;
+
 #if defined(OS_ANDROID)
   CONTENT_EXPORT static WebContents* FromJavaWebContents(
       const base::android::JavaRef<jobject>& jweb_contents_android);
   virtual base::android::ScopedJavaLocalRef<jobject> GetJavaWebContents() = 0;
 
   // Selects and zooms to the find result nearest to the point (x,y) defined in
   // find-in-page coordinates.
   virtual void ActivateNearestFindResult(float x, float y) = 0;
 
   // Requests the rects of the current find matches from the renderer
@@ skipping 21 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_