Move WebUI ownership from the RenderFrameHostManager to the RenderFrameHost.

content/browser/frame_host/render_frame_host_delegate.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_DELEGATE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/i18n/rtl.h"
+#include "content/browser/webui/web_ui_impl.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/common/javascript_message_type.h"
 #include "content/public/common/media_stream_request.h"
 #include "net/http/http_response_headers.h"
 
 #if defined(OS_WIN)
 #include "ui/gfx/native_widget_types.h"
 #endif
@@ skipping 134 matching lines @@
   //
   // TODO(alexmos): This method currently supports cross-process postMessage,
   // where we may need to create any missing proxies for the message's source
   // frame and its opener chain. It currently exists in WebContents due to a
   // special case for <webview> guests, but this logic should eventually be
   // moved down into RenderFrameProxyHost::RouteMessageEvent when <webview>
   // refactoring for --site-per-process mode is further along.  See
   // https://crbug.com/330264.
   virtual void EnsureOpenerProxiesExist(RenderFrameHost* source_rfh) {}
 
+  // Creates a WebUI object for a main frame navigating to the given URL. If no

[clamy, 2015/10/02 14:20:01]

Is this only called by main frames? Do subframes call something else/nothing?

[carlosk, 2015/10/05 16:59:57]

Gah! I missed updating this comment!

Clarifying: this is called for any navigation that goes through the
RFHM::UpdateStateForNavigate/GetFrameHostForNavigation related methods. IIUC
they are used both for main frames and subframes hence the rename from
CreateMainFrameWebUI.

+  // WebUI applies, returns nullptr. Ownership of the returned pointer will be
+  // passed to the caller.
+  virtual scoped_ptr<WebUIImpl> CreateWebUIForRenderFrameHost(const GURL& url);
+
 #if defined(OS_WIN)
   // Returns the frame's parent's NativeViewAccessible.
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif
 
  protected:
   virtual ~RenderFrameHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_DELEGATE_H_