Implement device enumeration for PPB_VideoCapture_Dev.

ppapi/proxy/ppb_video_capture_proxy.h

Index: ppapi/proxy/ppb_video_capture_proxy.h
diff --git a/ppapi/proxy/ppb_video_capture_proxy.h b/ppapi/proxy/ppb_video_capture_proxy.h
index 77295c7d684332d7cd150e75ae76067d8469e44a..f62af16331337ebd9da61c0f74e43bd7a6906dc8 100644
--- a/ppapi/proxy/ppb_video_capture_proxy.h
+++ b/ppapi/proxy/ppb_video_capture_proxy.h
@@ -1,15 +1,19 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 PPAPI_PROXY_PPB_VIDEO_CAPTURE_PROXY_H_
 #define PPAPI_PROXY_PPB_VIDEO_CAPTURE_PROXY_H_
 
+#include <string>
 #include <vector>
 
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
 #include "ppapi/proxy/serialized_structs.h"
+#include "ppapi/shared_impl/ppb_device_ref_shared.h"
+#include "ppapi/utility/completion_callback_factory.h"
 
 struct PPP_VideoCapture_Dev;
 struct PP_VideoCaptureDeviceInfo_Dev;
@@ -33,15 +37,29 @@ class PPB_VideoCapture_Proxy : public InterfaceProxy {
   static const ApiID kApiID = API_ID_PPB_VIDEO_CAPTURE_DEV;
 
  private:
-  // Message handlers.
+  // Message handlers in the renderer process.
   void OnMsgCreate(PP_Instance instance, ppapi::HostResource* result_resource);
+  void OnMsgEnumerateDevices(const ppapi::HostResource& resource);
   void OnMsgStartCapture(const ppapi::HostResource& resource,
+                         const std::string& device_id,
                          const PP_VideoCaptureDeviceInfo_Dev& info,
                          uint32_t buffers);
   void OnMsgReuseBuffer(const ppapi::HostResource& resource,
                         uint32_t buffer);
   void OnMsgStopCapture(const ppapi::HostResource& resource);
 
+  // Message handlers in the plugin process.
+  void OnMsgEnumerateDevicesACK(
+      const ppapi::HostResource& resource,
+      int32_t result,
+      const std::vector<ppapi::DeviceRefData>& devices);
+
+  void EnumerateDevicesACKInHost(int32_t result,
+                                 const ppapi::HostResource& resource);
+
+  pp::CompletionCallbackFactory<PPB_VideoCapture_Proxy,
+                                ProxyNonThreadSafeRefCount> callback_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(PPB_VideoCapture_Proxy);
 };