Switch the inheritance of WebView from WebWidget to protected.

third_party/WebKit/public/web/WebLocalFrame.h

 // Copyright 2014 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 WebLocalFrame_h
 #define WebLocalFrame_h
 
 #include "WebFrame.h"
 #include "WebFrameLoadType.h"
 
 namespace blink {
 
 class WebAutofillClient;
 class WebContentSettingsClient;
 class WebDevToolsAgent;
 class WebDevToolsAgentClient;
 class WebFrameClient;
 class WebNode;
 class WebScriptExecutionCallback;
 class WebSuspendableTask;
+class WebWidget;
 enum class WebAppBannerPromptReply;
 enum class WebCachePolicy;
 enum class WebSandboxFlags;
 enum class WebTreeScopeType;
 struct WebPrintPresetOptions;
 
 // Interface for interacting with in process frames. This contains methods that
 // require interacting with a frame's document.
 // FIXME: Move lots of methods from WebFrame in here.
 class WebLocalFrame : public WebFrame {
@@ skipping 278 matching lines @@
     // Set the tickmarks for the frame. This will override the default tickmarks
     // generated by find results. If this is called with an empty array, the
     // default behavior will be restored.
     virtual void setTickmarks(const WebVector<WebRect>&) = 0;
 
     // Context menu -----------------------------------------------------------
 
     // Returns the node that the context menu opened over.
     virtual WebNode contextMenuNode() const = 0;
 
+    // Returns the WebFrameWidget associated with this frame if there is one or
+    // nullptr otherwise.
+    virtual WebWidget* frameWidget() const = 0;
+
 protected:
     explicit WebLocalFrame(WebTreeScopeType scope) : WebFrame(scope) { }
 
     // Inherited from WebFrame, but intentionally hidden: it never makes sense
     // to call these on a WebLocalFrame.
     bool isWebLocalFrame() const override = 0;
     WebLocalFrame* toWebLocalFrame() override = 0;
     bool isWebRemoteFrame() const override = 0;
     WebRemoteFrame* toWebRemoteFrame() override = 0;
 };
 
 } // namespace blink
 
 #endif // WebLocalFrame_h