Replace safe-bool idiom with explicit WeakPtr::operator bool()

content/browser/renderer_host/media/video_capture_manager_unittest.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.
 
 // Unit test for VideoCaptureManager.
 
 #include "content/browser/renderer_host/media/video_capture_manager.h"
 
 #include <stdint.h>
 
@@ skipping 87 matching lines @@
   void OnGotControllerCallback(
       VideoCaptureControllerID id,
       base::Closure quit_closure,
       bool expect_success,
       const base::WeakPtr<VideoCaptureController>& controller) {
     if (expect_success) {
       ASSERT_TRUE(controller);
       ASSERT_TRUE(0 == controllers_.count(id));
       controllers_[id] = controller.get();
     } else {
-      ASSERT_TRUE(NULL == controller);
+      ASSERT_FALSE(controller);
     }
     quit_closure.Run();
   }
 
   VideoCaptureControllerID StartClient(int session_id, bool expect_success) {
     media::VideoCaptureParams params;
     params.requested_format = media::VideoCaptureFormat(
         gfx::Size(320, 240), 30, media::PIXEL_FORMAT_I420);
 
     VideoCaptureControllerID client_id(next_client_id_++);
@@ skipping 497 matching lines @@
   // Wait to check callbacks before removing the listener.
   message_loop_->RunUntilIdle();
   vcm_->Unregister();
 }
 #endif
 
 // TODO(mcasas): Add a test to check consolidation of the supported formats
 // provided by the device when http://crbug.com/323913 is closed.
 
 }  // namespace content