Replacing most of web_task.h with base::Closure + base::WeakPtrFactory.

components/test_runner/mock_web_media_stream_center.cc

Index: components/test_runner/mock_web_media_stream_center.cc
diff --git a/components/test_runner/mock_web_media_stream_center.cc b/components/test_runner/mock_web_media_stream_center.cc
index 24d526813837ef4f91e02b8e34f9acfa91084362..a674beea2e86ee6e3d09c35d0c187861ac88d065 100644
--- a/components/test_runner/mock_web_media_stream_center.cc
+++ b/components/test_runner/mock_web_media_stream_center.cc
@@ -41,8 +41,7 @@ class MockWebAudioDestinationConsumer
 MockWebMediaStreamCenter::MockWebMediaStreamCenter(
     blink::WebMediaStreamCenterClient* client,
     TestInterfaces* interfaces)
-    : interfaces_(interfaces) {
-}
+    : interfaces_(interfaces) {}
 
 MockWebMediaStreamCenter::~MockWebMediaStreamCenter() {
 }