Make VideoCaptureController single-threaded and not ref counted.

content/browser/renderer_host/media/video_capture_manager_unittest.cc

Index: content/browser/renderer_host/media/video_capture_manager_unittest.cc
diff --git a/content/browser/renderer_host/media/video_capture_manager_unittest.cc b/content/browser/renderer_host/media/video_capture_manager_unittest.cc
index 92a04da2ccac9335fc32038b8c2638b1681368fc..34172d78cb4820745c1fa706a186adde23bc14f3 100644
--- a/content/browser/renderer_host/media/video_capture_manager_unittest.cc
+++ b/content/browser/renderer_host/media/video_capture_manager_unittest.cc
@@ -85,14 +85,15 @@ class VideoCaptureManagerTest : public testing::Test {
 
   virtual void TearDown() OVERRIDE {}
 
-  void OnGotControllerCallback(VideoCaptureControllerID id,
-                               base::Closure quit_closure,
-                               bool expect_success,
-                               VideoCaptureController* controller) {
+  void OnGotControllerCallback(
+      VideoCaptureControllerID id,
+      base::Closure quit_closure,
+      bool expect_success,
+      const base::WeakPtr<VideoCaptureController>& controller) {
     if (expect_success) {
-      ASSERT_TRUE(NULL != controller);
+      ASSERT_TRUE(controller);
       ASSERT_TRUE(0 == controllers_.count(id));
-      controllers_[id] = controller;
+      controllers_[id] = controller.get();
     } else {
       ASSERT_TRUE(NULL == controller);
     }