Implement device enumeration for PPB_VideoCapture_Dev.

ppapi/cpp/dev/video_capture_dev.cc

Index: ppapi/cpp/dev/video_capture_dev.cc
diff --git a/ppapi/cpp/dev/video_capture_dev.cc b/ppapi/cpp/dev/video_capture_dev.cc
index ecb55729309c5badbf17fb4efa2f0cef32d8593f..7a4502835ce377d21789e0b4ccc7cebb1aadd38d 100644
--- a/ppapi/cpp/dev/video_capture_dev.cc
+++ b/ppapi/cpp/dev/video_capture_dev.cc
@@ -1,4 +1,4 @@
-// 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.
 
@@ -6,6 +6,9 @@
 
 #include "ppapi/c/dev/ppb_video_capture_dev.h"
 #include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/dev/device_ref_dev.h"
+#include "ppapi/cpp/dev/resource_array_dev.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/module_impl.h"
@@ -39,13 +42,34 @@ bool VideoCapture_Dev::IsAvailable() {
   return has_interface<PPB_VideoCapture_Dev>();
 }
 
+int32_t VideoCapture_Dev::EnumerateDevices(const CompletionCallback& callback) {
+  if (!has_interface<PPB_VideoCapture_Dev>())
+    return callback.MayForce(PP_ERROR_NOINTERFACE);
+  return get_interface<PPB_VideoCapture_Dev>()->EnumerateDevices(
+      pp_resource(), callback.pp_completion_callback());
+}
+
+void VideoCapture_Dev::GetDevices(std::vector<DeviceRef_Dev>* devices) {
+  if (!has_interface<PPB_VideoCapture_Dev>() || !devices)
+    return;
+  devices->clear();
+  ResourceArray_Dev resources(
+      ResourceArray_Dev::PassRef(),
+      get_interface<PPB_VideoCapture_Dev>()->GetDevices(pp_resource()));
+  for (uint32_t index = 0; index < resources.size(); ++index) {
+    DeviceRef_Dev device(resources[index]);
+    devices->push_back(device);
+  }
+}
+
 int32_t VideoCapture_Dev::StartCapture(
+    const DeviceRef_Dev& device_ref,
     const PP_VideoCaptureDeviceInfo_Dev& requested_info,
     uint32_t buffer_count) {
   if (!has_interface<PPB_VideoCapture_Dev>())
     return PP_ERROR_FAILED;
   return get_interface<PPB_VideoCapture_Dev>()->StartCapture(
-      pp_resource(), &requested_info, buffer_count);
+      pp_resource(), device_ref.pp_resource(), &requested_info, buffer_count);
 }
 
 int32_t VideoCapture_Dev::ReuseBuffer(uint32_t buffer) {