Switch content tests to use BrowserThreadImpl directly.

content/browser/renderer_host/media/audio_input_device_manager_unittest.cc

Index: content/browser/renderer_host/media/audio_input_device_manager_unittest.cc
diff --git a/content/browser/renderer_host/media/audio_input_device_manager_unittest.cc b/content/browser/renderer_host/media/audio_input_device_manager_unittest.cc
index dd6d3038e432e35d33c395859e2b2321266d85e8..7813706e7fdf93d50f123cb31cfbd4b785d18f78 100644
--- a/content/browser/renderer_host/media/audio_input_device_manager_unittest.cc
+++ b/content/browser/renderer_host/media/audio_input_device_manager_unittest.cc
@@ -7,9 +7,9 @@
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
+#include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager_event_handler.h"
-#include "content/test/test_browser_thread.h"
 #include "media/audio/audio_manager.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -19,6 +19,8 @@ using ::testing::AnyNumber;
 using ::testing::InSequence;
 using ::testing::Return;
 
+using content::BrowserThreadImpl;
+
 namespace media_stream {
 
 class MockAudioInputDeviceManagerListener
@@ -85,8 +87,8 @@ class AudioInputDeviceManagerTest: public testing::Test {
   virtual void SetUp() {
     // The test must run on Browser::IO.
     message_loop_.reset(new MessageLoop(MessageLoop::TYPE_IO));
-    io_thread_.reset(new content::TestBrowserThread(BrowserThread::IO,
-                                                    message_loop_.get()));
+    io_thread_.reset(new BrowserThreadImpl(BrowserThread::IO,
+                                           message_loop_.get()));
     manager_.reset(new media_stream::AudioInputDeviceManager());
     audio_input_listener_.reset(new MockAudioInputDeviceManagerListener());
     manager_->Register(audio_input_listener_.get());
@@ -128,7 +130,7 @@ class AudioInputDeviceManagerTest: public testing::Test {
     message_loop_->Run();
   }
   scoped_ptr<MessageLoop> message_loop_;
-  scoped_ptr<content::TestBrowserThread> io_thread_;
+  scoped_ptr<BrowserThreadImpl> io_thread_;
   scoped_ptr<AudioInputDeviceManager> manager_;
   scoped_ptr<MockAudioInputDeviceManagerListener> audio_input_listener_;