Surface synchronization: Implement auto-resize for OOPIF/BrowserPlugin

https://chromium-review.googlesource.com/c/chromium/src/+/753801

atom/browser/api/atom_api_web_contents.h

@@ -337,6 +337,8 @@ class WebContents : public mate::TrackableObject<WebContents>,
       const content::BluetoothChooser::EventHandler& handler) override;
   content::JavaScriptDialogManager* GetJavaScriptDialogManager(
       content::WebContents* source) override;
+  void ResizeDueToAutoResize(content::WebContents* web_contents,
+                             const gfx::Size& new_size) override;
 
   // content::WebContentsObserver:
   void BeforeUnloadFired(const base::TimeTicks& proceed_time) override;