PPAPI: Make blocking completion callbacks work.

webkit/plugins/ppapi/ppb_video_capture_impl.h

Index: webkit/plugins/ppapi/ppb_video_capture_impl.h
diff --git a/webkit/plugins/ppapi/ppb_video_capture_impl.h b/webkit/plugins/ppapi/ppb_video_capture_impl.h
index 8c77138e5c3418b183b757da5bb4b59b40ea96fa..a5a0c5b28af33d489697acdf454b8fd86f78f11a 100644
--- a/webkit/plugins/ppapi/ppb_video_capture_impl.h
+++ b/webkit/plugins/ppapi/ppb_video_capture_impl.h
@@ -54,12 +54,12 @@ class PPB_VideoCapture_Impl
   // PPB_VideoCapture_Shared implementation.
   virtual int32_t InternalEnumerateDevices(
       PP_Resource* devices,
-      const PP_CompletionCallback& callback) OVERRIDE;
+      ::ppapi::ApiCallbackType callback) OVERRIDE;
   virtual int32_t InternalOpen(
       const std::string& device_id,
       const PP_VideoCaptureDeviceInfo_Dev& requested_info,
       uint32_t buffer_count,
-      const PP_CompletionCallback& callback) OVERRIDE;
+      ::ppapi::ApiCallbackType callback) OVERRIDE;
   virtual int32_t InternalStartCapture() OVERRIDE;
   virtual int32_t InternalReuseBuffer(uint32_t buffer) OVERRIDE;
   virtual int32_t InternalStopCapture() OVERRIDE;