linux: only create browser-side plugin container after plugin requests it

webkit/glue/webview_delegate.h

 // Copyright (c) 2006-2008 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.
 
 // WebCore provides hooks for several kinds of functionality, allowing separate
 // classes termed "delegates" to receive notifications (in the form of direct
 // function calls) when certain events are about to occur or have just occurred.
 // In some cases, the delegate implements the needed functionality; in others,
 // the delegate has some control over the behavior but doesn't actually
 // implement it.  For example, the UI delegate is responsible for showing a
@@ skipping 115 matching lines @@
   // platform-neutral
   virtual WebPluginDelegate* CreatePluginDelegate(
       WebView* webview,
       const GURL& url,
       const std::string& mime_type,
       const std::string& clsid,
       std::string* actual_mime_type) {
     return NULL;
   }
 
+  // Called when a windowed plugin is initializing, to request a container
+  // for the plugin.  Only used on Linux.
+  virtual gfx::PluginWindowHandle CreatePluginContainer() { return 0; }
+
   // Called when a windowed plugin is closing.
   // Lets the view delegate shut down anything it is using to wrap the plugin.
   virtual void WillDestroyPluginWindow(gfx::PluginWindowHandle handle) { }
 
   // This method is called when the renderer creates a worker object.
   virtual WebKit::WebWorker* CreateWebWorker(WebKit::WebWorkerClient* client) {
     return NULL;
   }
 
   // Called when a WebMediaPlayer is needed.
@@ skipping 668 matching lines @@
   virtual void DidAddHistoryItem() { }
 
   WebViewDelegate() { }
   virtual ~WebViewDelegate() { }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebViewDelegate);
 };
 
 #endif  // WEBKIT_GLUE_WEBVIEW_DELEGATE_H_