PPB_UDPSocket_Private is switched to the new Pepper proxy.

content/public/browser/browser_ppapi_host.h

Index: content/public/browser/browser_ppapi_host.h
diff --git a/content/public/browser/browser_ppapi_host.h b/content/public/browser/browser_ppapi_host.h
index 2dbdfe30205d346f14047f97086d13396dda7a90..e387ac02f6951a2b2cdf8a0b247cf01f71fb0713 100644
--- a/content/public/browser/browser_ppapi_host.h
+++ b/content/public/browser/browser_ppapi_host.h
@@ -9,7 +9,9 @@
 #include "base/process.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
+#include "content/public/common/process_type.h"
 #include "ppapi/c/pp_instance.h"
 
 namespace IPC {
@@ -45,6 +47,7 @@ class CONTENT_EXPORT BrowserPpapiHost {
       ppapi::PpapiPermissions permissions,
       base::ProcessHandle plugin_child_process,
       int plugin_child_process_id,
+      ProcessType process_type,
       IPC::ChannelProxy* channel,
       net::HostResolver* host_resolver,
       int render_process_id,
@@ -81,6 +84,58 @@ class CONTENT_EXPORT BrowserPpapiHost {
 
   // Returns the unique id of the child plugin process (this is NOT the pid).
   virtual int GetPluginProcessID() = 0;
+
+  // Schedules the given callback to execute on the UI thread of the browser,
+  // passing the RenderViewHost associated with the given instance as a
+  // parameter.
+  //
+  // Normally this would be called from a ResourceHost with the reply using
+  // a weak pointer to itself.
+  //
+  // Importantly, the task will not be run if the RenderView is destroyed by
+  // the time we get to the UI thread, or if the PP_Instance is invalid, but
+  // the reply will still be run. The return type in this case will be a
+  // default-constructed |ReturnType|.
+  //
+  // So you may want to make sure you don't do silly things in the reply
+  // handler if the task on the UI thread is never run and you get a
+  // default-constructed result.
+  template<typename ReturnType>
+  bool PostOnUIThreadWithRenderViewHostAndReply(
+      const tracked_objects::Location& from_here,
+      PP_Instance instance,
+      const base::Callback<ReturnType(RenderViewHost*)>& task,
+      const base::Callback<void(ReturnType)>& reply) const {
+    int render_process_id, render_view_id;
+    bool success = GetRenderViewIDsForInstance(instance,
+                                               &render_process_id,
+                                               &render_view_id);
+    if (!success)
+      return false;
+    BrowserThread::PostTaskAndReplyWithResult(
+        BrowserThread::UI,
+        from_here,
+        base::Bind(&CallWithRenderViewHost<ReturnType>,
+                   render_process_id, render_view_id, task),
+        reply);
+    return true;
+  }
+
+ protected:
+  // Backend for PostOnUIThreadWithRenderViewAndReply. This converts the IDs
+  // to a RenderViewHost and calls the function, or returns a
+  // default-constructed return value on error.
+  template<typename ReturnType>
+  static ReturnType CallWithRenderViewHost(
+      int render_process_id,
+      int render_view_id,
+      const base::Callback<ReturnType(RenderViewHost*)>& task) {
+    RenderViewHost* render_view_host = RenderViewHost::FromID(render_process_id,
+                                                              render_view_id);
+    if (render_view_host)
+      return task.Run(render_view_host);
+    return ReturnType();
+  }
 };
 
 }  // namespace content