Add TestBrowserThreadBundle into RenderViewHostTestHarness. Kill some unnecessary real threads.

chrome/browser/ui/cocoa/content_settings/content_setting_bubble_cocoa_unittest.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/content_settings/content_setting_bubble_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/memory/scoped_nsobject.h"
+#include "chrome/browser/media/media_capture_devices_dispatcher.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "chrome/browser/ui/content_settings/content_setting_bubble_model.h"
 #include "chrome/common/content_settings_types.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/common/media_stream_request.h"
-#include "content/public/test/test_browser_thread.h"
 #include "grit/generated_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #include "ui/base/l10n/l10n_util.h"
 
-using content::BrowserThread;
-
 namespace {
 
 class DummyContentSettingBubbleModel : public ContentSettingBubbleModel {
  public:
   DummyContentSettingBubbleModel(content::WebContents* web_contents,
                                  Profile* profile,
                                  ContentSettingsType content_type)
       : ContentSettingBubbleModel(web_contents, profile, content_type) {
     RadioGroup radio_group;
     radio_group.default_item = 0;
     radio_group.radio_items.resize(2);
     set_radio_group(radio_group);
     MediaMenu micMenu;
     micMenu.label = "Microphone:";
     add_media_menu(content::MEDIA_DEVICE_AUDIO_CAPTURE, micMenu);
     MediaMenu cameraMenu;
     cameraMenu.label = "Camera:";
     add_media_menu(content::MEDIA_DEVICE_VIDEO_CAPTURE, cameraMenu);
   }
 };
 
 class ContentSettingBubbleControllerTest
     : public ChromeRenderViewHostTestHarness {
- public:
-  ContentSettingBubbleControllerTest();
-  virtual ~ContentSettingBubbleControllerTest();
-
  protected:
   // Helper function to create the bubble controller.
   ContentSettingBubbleController* CreateBubbleController(
       ContentSettingsType settingsType);
 
   scoped_nsobject<NSWindow> parent_;
 
  private:
-  content::TestBrowserThread browser_thread_;
-
   base::mac::ScopedNSAutoreleasePool pool_;
 };
 
-ContentSettingBubbleControllerTest::ContentSettingBubbleControllerTest()
-    : ChromeRenderViewHostTestHarness(),
-      browser_thread_(BrowserThread::UI, &message_loop_) {
-}
-
-ContentSettingBubbleControllerTest::~ContentSettingBubbleControllerTest() {
-}
-
 ContentSettingBubbleController*
 ContentSettingBubbleControllerTest::CreateBubbleController(
     ContentSettingsType settingsType) {
   parent_.reset([[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 800, 600)
                                             styleMask:NSBorderlessWindowMask
                                               backing:NSBackingStoreBuffered
                                                 defer:NO]);
   [parent_ setReleasedWhenClosed:NO];
   [parent_ orderFront:nil];
 
@@ skipping 29 matching lines @@
 
     ContentSettingBubbleController* controller =
         CreateBubbleController(settingsType);
     EXPECT_EQ(0u, [controller mediaMenus]->size());
     [parent_ close];
   }
 }
 
 // Check that the bubble works for CONTENT_SETTINGS_TYPE_MEDIASTREAM.
 TEST_F(ContentSettingBubbleControllerTest, MediaStreamBubble) {
+  MediaCaptureDevicesDispatcher::GetInstance()->
+      DisableDeviceEnumerationForTesting();
   ContentSettingBubbleController* controller =
       CreateBubbleController(CONTENT_SETTINGS_TYPE_MEDIASTREAM);
   content_setting_bubble::MediaMenuPartsMap* mediaMenus =
       [controller mediaMenus];
   EXPECT_EQ(2u, mediaMenus->size());
   NSString* title = l10n_util::GetNSString(IDS_MEDIA_MENU_NO_DEVICE_TITLE);
   for (content_setting_bubble::MediaMenuPartsMap::const_iterator i =
        mediaMenus->begin(); i != mediaMenus->end(); ++i) {
     EXPECT_TRUE((content::MEDIA_DEVICE_AUDIO_CAPTURE == i->second->type) ||
                 (content::MEDIA_DEVICE_VIDEO_CAPTURE == i->second->type));
     EXPECT_EQ(0, [i->first numberOfItems]);
     EXPECT_NSEQ(title, [i->first title]);
     EXPECT_FALSE([i->first isEnabled]);
   }
 
  [parent_ close];
 }
 
 }  // namespace