Create a WebFrameWidget for WebViewPlugin.

components/plugins/renderer/webview_plugin.cc

 // Copyright 2013 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.
 
 #include "components/plugins/renderer/webview_plugin.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/numerics/safe_conversions.h"
 #include "content/public/common/web_preferences.h"
 #include "content/public/renderer/render_view.h"
 #include "gin/converter.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
+#include "third_party/WebKit/public/web/WebFrameWidget.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 using blink::WebCanvas;
 using blink::WebCursorInfo;
 using blink::WebDragData;
 using blink::WebDragOperationsMask;
+using blink::WebFrameWidget;
 using blink::WebImage;
 using blink::WebInputEvent;
 using blink::WebLocalFrame;
 using blink::WebMouseEvent;
 using blink::WebPlugin;
 using blink::WebPluginContainer;
 using blink::WebPoint;
 using blink::WebRect;
 using blink::WebSize;
 using blink::WebString;
 using blink::WebURLError;
 using blink::WebURLRequest;
 using blink::WebURLResponse;
 using blink::WebVector;
 using blink::WebView;
 using content::WebPreferences;
 
 WebViewPlugin::WebViewPlugin(content::RenderView* render_view,
                              WebViewPlugin::Delegate* delegate,
                              const WebPreferences& preferences)
     : content::RenderViewObserver(render_view),
       delegate_(delegate),
       container_(nullptr),
       web_view_(WebView::create(this)),
       finished_loading_(false),
       focused_(false) {
   // ApplyWebPreferences before making a WebLocalFrame so that the frame sees a
   // consistent view of our preferences.
   content::RenderView::ApplyWebPreferences(preferences, web_view_);
-  web_frame_ = WebLocalFrame::create(blink::WebTreeScopeType::Document, this);
+  WebLocalFrame* web_local_frame =
+      WebLocalFrame::create(blink::WebTreeScopeType::Document, this);
+  web_frame_ = web_local_frame;
   web_view_->setMainFrame(web_frame_);
+  // TODO(dcheng): The main frame widget currently has a special case.
+  // Eliminate this once WebView is no longer a WebWidget.
+  web_frame_widget_ = WebFrameWidget::create(this, web_view_, web_local_frame);
 }
 
 // static
 WebViewPlugin* WebViewPlugin::Create(content::RenderView* render_view,
                                      WebViewPlugin::Delegate* delegate,
                                      const WebPreferences& preferences,
                                      const std::string& html_data,
                                      const GURL& url) {
   DCHECK(url.is_valid()) << "Blink requires the WebView to have a valid URL.";
   WebViewPlugin* plugin = new WebViewPlugin(render_view, delegate, preferences);
   plugin->web_view()->mainFrame()->loadHTMLString(html_data, url);
   return plugin;
 }
 
 WebViewPlugin::~WebViewPlugin() {
+  web_frame_widget_->close();
   web_view_->close();
   web_frame_->close();
 }
 
 void WebViewPlugin::ReplayReceivedData(WebPlugin* plugin) {
   if (!response_.isNull()) {
     plugin->didReceiveResponse(response_);
     size_t total_bytes = 0;
     for (std::list<std::string>::iterator it = data_.begin(); it != data_.end();
          ++it) {
@@ skipping 228 matching lines @@
   // By default RenderViewObservers are destroyed along with the RenderView.
   // WebViewPlugin has a custom destruction mechanism, so we disable this.
 }
 
 void WebViewPlugin::OnZoomLevelChanged() {
   if (container_) {
     web_view_->setZoomLevel(
       blink::WebView::zoomFactorToZoomLevel(container_->pageZoomFactor()));
   }
 }