Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/browser/sync/backend_migrator_unittest.cc

Index: chrome/browser/sync/backend_migrator_unittest.cc
diff --git a/chrome/browser/sync/backend_migrator_unittest.cc b/chrome/browser/sync/backend_migrator_unittest.cc
index d42957504908a7896762c4e0818b888b94ac15d8..94983926a234e55f0929e13dc916010b71a8ff27 100644
--- a/chrome/browser/sync/backend_migrator_unittest.cc
+++ b/chrome/browser/sync/backend_migrator_unittest.cc
@@ -8,7 +8,6 @@
 #include "chrome/browser/sync/profile_sync_service_mock.h"
 #include "chrome/browser/sync/sessions/session_state.h"
 #include "chrome/common/chrome_notification_types.h"
-#include "chrome/test/base/testing_browser_process_test.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -25,7 +24,7 @@ using sessions::ErrorCounters;
 using sessions::SyncerStatus;
 using sessions::SyncSessionSnapshot;
 
-class BackendMigratorTest : public TestingBrowserProcessTest {
+class BackendMigratorTest : public testing::Test {
  public:
   BackendMigratorTest() { }
   virtual ~BackendMigratorTest() { }