Implement device enumeration for PPB_VideoCapture_Dev.

webkit/plugins/ppapi/mock_plugin_delegate.cc

Index: webkit/plugins/ppapi/mock_plugin_delegate.cc
diff --git a/webkit/plugins/ppapi/mock_plugin_delegate.cc b/webkit/plugins/ppapi/mock_plugin_delegate.cc
index da371c546cd1257ae420b5fc8084c7e0cc34ef46..c8d3b80cccfa32f81082aaef0ecad60820dadb0b 100644
--- a/webkit/plugins/ppapi/mock_plugin_delegate.cc
+++ b/webkit/plugins/ppapi/mock_plugin_delegate.cc
@@ -66,7 +66,8 @@ MockPluginDelegate::CreateVideoDecoder(
 
 MockPluginDelegate::PlatformVideoCapture*
 MockPluginDelegate::CreateVideoCapture(
-    media::VideoCapture::EventHandler* handler){
+    const std::string& device_id,
+    PlatformVideoCaptureEventHandler* handler){
   return NULL;
 }
 
@@ -374,5 +375,11 @@ bool MockPluginDelegate::IsPageVisible() const {
   return true;
 }
 
+int MockPluginDelegate::EnumerateDevices(
+    PP_DeviceType_Dev type,
+    const EnumerateDevicesCallback& callback) {
+  return -1;
+}
+
 }  // namespace ppapi
 }  // namespace webkit