Support exposing Mojo services between render frames, render threads, and their respective hosts.

content/public/browser/render_process_host.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_RENDER_PROCESS_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/id_map.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
 #include "base/supports_user_data.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_sender.h"
 #include "ui/gfx/native_widget_types.h"
 
 class GURL;
 struct ViewMsg_SwapOut_Params;
 
 namespace base {
 class TimeDelta;
 }
 
 namespace content {
 class BrowserContext;
 class BrowserMessageFilter;
 class RenderProcessHostObserver;
 class RenderWidgetHost;
+class ServiceRegistry;
 class StoragePartition;
 struct GlobalRequestID;
 
 // Interface that represents the browser side of the browser <-> renderer
 // communication channel. There will generally be one RenderProcessHost per
 // renderer process.
 class CONTENT_EXPORT RenderProcessHost : public IPC::Sender,
                                          public IPC::Listener,
                                          public base::SupportsUserData {
  public:
@@ skipping 185 matching lines @@
 #endif
 
   // Tells the ResourceDispatcherHost to resume a deferred navigation without
   // transferring it to a new renderer process.
   virtual void ResumeDeferredNavigation(const GlobalRequestID& request_id) = 0;
 
   // Notifies the renderer that the timezone configuration of the system might
   // have changed.
   virtual void NotifyTimezoneChange() = 0;
 
+  // Returns the ServiceRegistry for this process.
+  virtual ServiceRegistry* GetServiceRegistry() = 0;
+
+  // Activates mojo for this process.
+  virtual void ActivateMojo() = 0;

[darin (slow to review), 2014/06/18 00:09:28]

It'd be nice to make ActivateMojo() a private implementation detail. Eventually,
we will just activate mojo immediately. We only need a signal from the
browser-side for now as we don't want to expose mojo to all renderers yet.

[Sam McNally, 2014/06/18 01:31:40]

Done.

+
   // Static management functions -----------------------------------------------
 
   // Flag to run the renderer in process.  This is primarily
   // for debugging purposes.  When running "in process", the
   // browser maintains a single RenderProcessHost which communicates
   // to a RenderProcess which is instantiated in the same process
   // with the Browser.  All IPC between the Browser and the
   // Renderer is the same, it's just not crossing a process boundary.
 
   static bool run_renderer_in_process();
@@ skipping 38 matching lines @@
   static void SetMaxRendererProcessCount(size_t count);
 
   // Returns the current max number of renderer processes used by the content
   // module.
   static size_t GetMaxRendererProcessCount();
 };
 
 }  // namespace content.
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_PROCESS_HOST_H_