Convert to new enter method

ppapi/thunk/ppb_video_capture_thunk.cc

 // 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.
 
 #include "ppapi/c/pp_errors.h"
-#include "ppapi/thunk/common.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/thunk.h"
 #include "ppapi/thunk/ppb_video_capture_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 
 namespace ppapi {
 namespace thunk {
 
 namespace {
 
 typedef EnterResource<PPB_VideoCapture_API> EnterVideoCapture;
 
 PP_Resource Create(PP_Instance instance) {
   EnterFunction<ResourceCreationAPI> enter(instance, true);
   if (enter.failed())
     return 0;
   return enter.functions()->CreateVideoCapture(instance);
 }
 
 PP_Bool IsVideoCapture(PP_Resource resource) {
   EnterVideoCapture enter(resource, false);
   return PP_FromBool(enter.succeeded());
 }
 
 int32_t StartCapture(PP_Resource video_capture,
                      const PP_VideoCaptureDeviceInfo_Dev* requested_info,
                      uint32_t buffer_count) {
   EnterVideoCapture enter(video_capture, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-
+    return enter.retval();
   return enter.object()->StartCapture(*requested_info, buffer_count);
 }
 
 int32_t ReuseBuffer(PP_Resource video_capture,
                     uint32_t buffer) {
   EnterVideoCapture enter(video_capture, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-
+    return enter.retval();
   return enter.object()->ReuseBuffer(buffer);
 }
 
 int32_t StopCapture(PP_Resource video_capture) {
   EnterVideoCapture enter(video_capture, true);
   if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-
+    return enter.retval();
   return enter.object()->StopCapture();
 }
 
 const PPB_VideoCapture_Dev g_ppb_videocapture_thunk = {
   &Create,
   &IsVideoCapture,
   &StartCapture,
   &ReuseBuffer,
   &StopCapture
 };
 
 }  // namespace
 
 const PPB_VideoCapture_Dev_0_1* GetPPB_VideoCapture_Dev_0_1_Thunk() {
   return &g_ppb_videocapture_thunk;
 }
 
 }  // namespace thunk
 }  // namespace ppapi