Refactor postMessage for out-of-process iframes.

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/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
 
 class GURL;
 
@@ skipping 137 matching lines @@
   // Gets the GeolocationServiceContext associated with this delegate.
   virtual GeolocationServiceContext* GetGeolocationServiceContext();
 
   // Notification that the frame wants to go into fullscreen mode.
   // |origin| represents the origin of the frame that requests fullscreen.
   virtual void EnterFullscreenMode(const GURL& origin) {}
 
   // Notification that the frame wants to go out of fullscreen mode.
   virtual void ExitFullscreenMode() {}
 
+  // Let the delegate decide whether postMessage should be delivered to
+  // |target_rfh| from a source frame in the given SiteInstance.

[Charlie Reis, 2015/04/07 21:14:32]

Let's mention that this overrides the RFH's decision if true, and that it
defaults to false.

[alexmos, 2015/04/07 21:47:30]

Done.

+  virtual bool ShouldRouteMessageEvent(
+      RenderFrameHost* target_rfh,
+      SiteInstance* source_site_instance) const;
+
+  // Ensure that |render_frame_host| has swapped-out RenderViews and proxies

[Charlie Reis, 2015/04/07 21:14:32]

nit: source_rfh

[alexmos, 2015/04/07 21:47:30]

Done.

+  // for itself and for each frame on its opener chain in the current frame's
+  // SiteInstance.  Returns the routing ID of the swapped-out RenderView
+  // corresponding to |render_frame_host|.
+  //
+  // TODO(alexmos): This method will be removed once opener tracking and
+  // CreateOpenerRenderViews moves out of WebContents and into lower layers, as
+  // part of https://crbug.com/225940.  Currently, this method temporarily
+  // supports cross-process postMessage in non-site-per-process mode, where we
+  // need to create any missing proxies for the message's source frame and its
+  // opener chain on demand.
+  virtual int EnsureOpenerRenderViewsExist(RenderFrameHost* render_frame_host);
+
 #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_