Move ClosePage() from RenderViewHost to WebContents.

content/public/browser/web_contents.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 202 matching lines @@
   virtual RenderViewHost* GetRenderViewHost() const = 0;
 
   // Gets the current RenderViewHost's routing id. Returns
   // MSG_ROUTING_NONE when there is no RenderViewHost.
   virtual int GetRoutingID() const = 0;
 
   // Returns the currently active RenderWidgetHostView. This may change over
   // time and can be nullptr (during setup and teardown).
   virtual RenderWidgetHostView* GetRenderWidgetHostView() const = 0;
 
+  // Causes the current page to be closed, including running its onunload event
+  // handler.  A ClosePage_ACK message is sent when it is finished.

[Charlie Reis, 2015/04/29 17:31:18]

We probably don't need to mention the ACK here, since it's not exposed by the
public WebContents API.  (Mentioning it in RenderViewHostImpl::ClosePage does
make sense.)

[nasko, 2015/04/29 21:15:33]

Done.

+  virtual void ClosePage() = 0;
+
   // Returns the currently active fullscreen widget. If there is none, returns
   // nullptr.
   virtual RenderWidgetHostView* GetFullscreenRenderWidgetHostView() const = 0;
 
   // Returns the theme color for the underlying content as set by the
   // theme-color meta tag.
   virtual SkColor GetThemeColor() const = 0;
 
   // Create a WebUI page for the given url. In most cases, this doesn't need to
   // be called by embedders since content will create its own WebUI objects as
@@ skipping 410 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_