Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/browser/background/background_contents_service_unittest.cc

Index: chrome/browser/background/background_contents_service_unittest.cc
diff --git a/chrome/browser/background/background_contents_service_unittest.cc b/chrome/browser/background/background_contents_service_unittest.cc
index 8bdc96dd7f2024feda3a89efaec78012afe10879..b6eac81f057538a0d5a9fda9951df1d0a78ee40b 100644
--- a/chrome/browser/background/background_contents_service_unittest.cc
+++ b/chrome/browser/background/background_contents_service_unittest.cc
@@ -16,13 +16,12 @@
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_browser_process.h"
-#include "chrome/test/base/testing_browser_process_test.h"
 #include "chrome/test/base/testing_profile.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
-class BackgroundContentsServiceTest : public TestingBrowserProcessTest {
+class BackgroundContentsServiceTest : public testing::Test {
  public:
   BackgroundContentsServiceTest() {}
   ~BackgroundContentsServiceTest() {}