Update didClearWindowObject API in webview plugin

We now only call this method for the main world (world_id == 0)

BUG=none
R=bauerb@chromium.org

Review URL: https://codereview.chromium.org/292493002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270998 0039d316-1c4b-4281-b951-d872f2087c98

components/plugins/renderer/webview_plugin.cc

@@ -232,7 +232,7 @@ void WebViewPlugin::didChangeCursor(const WebCursorInfo& cursor) {
   current_cursor_ = cursor;
 }
 
-void WebViewPlugin::didClearWindowObject(WebLocalFrame* frame, int world_id) {
+void WebViewPlugin::didClearWindowObject(WebLocalFrame* frame) {
   if (delegate_)
     delegate_->BindWebFrame(frame);
 }

components/plugins/renderer/webview_plugin.h

@@ -125,7 +125,7 @@ class WebViewPlugin : public blink::WebPlugin,
   virtual void didChangeCursor(const blink::WebCursorInfo& cursor);
 
   // WebFrameClient methods:
-  virtual void didClearWindowObject(blink::WebLocalFrame* frame, int world_id);
+  virtual void didClearWindowObject(blink::WebLocalFrame* frame);
 
   // This method is defined in WebPlugin as well as in WebFrameClient, but with
   // different parameters. We only care about implementing the WebPlugin