AndroidOverlay implementation using Dialog.

content/public/browser/render_frame_host.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_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
+#include "base/unguessable_token.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/public/common/console_message_level.h"
 #include "content/public/common/file_chooser_params.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 #include "url/gurl.h"
@@ skipping 31 matching lines @@
 #if defined(OS_ANDROID)
   // Globally allows for injecting JavaScript into the main world. This feature
   // is present only to support Android WebView and must not be used in other
   // configurations.
   static void AllowInjectingJavaScriptForAndroidWebView();
 #endif
 
   // Returns a RenderFrameHost given its accessibility tree ID.
   static RenderFrameHost* FromAXTreeID(int ax_tree_id);
 
+#if defined(OS_ANDROID)
+  // Returns a RenderFrameHost given its AndroidOverlay routing token.
+  static RenderFrameHost* FromOverlayRoutingToken(
+      const base::UnguessableToken& token);
+#endif
+
   ~RenderFrameHost() override {}
 
   // Returns the route id for this frame.
   virtual int GetRoutingID() = 0;
 
   // Returns the accessibility tree ID for this RenderFrameHost.
   virtual int GetAXTreeID() = 0;
 
+#if defined(OS_ANDROID)
+  // Returns an unguessable token for this RFHI.  This provides a temporary way
+  // to identify a RenderFrameHost that's compatible with IPC.  Else, one needs
+  // to send pid + RoutingID, but one cannot send pid.  One can get it from the
+  // channel, but this makes it much harder to get wrong.
+  // Once media switches to mojo, we should be able to remove this in favor of
+  // sending a mojo overlay factory.
+  virtual const base::UnguessableToken& GetOverlayRoutingToken() = 0;

[boliu, 2017/03/30 22:42:02]

ditto about public

[liberato (no reviews please), 2017/04/04 17:49:28]

Done.

+#endif
+
   // Returns the SiteInstance grouping all RenderFrameHosts that have script
   // access to this RenderFrameHost, and must therefore live in the same
   // process.
   virtual SiteInstance* GetSiteInstance() = 0;
 
   // Returns the process for this frame.
   virtual RenderProcessHost* GetProcess() = 0;
 
   // Returns the RenderWidgetHostView that can be used to control focus and
   // visibility for this frame.
@@ skipping 168 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderFrameHostImpl;
   RenderFrameHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_FRAME_HOST_H_