Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/browser/extensions/extension_updater_unittest.cc

Index: chrome/browser/extensions/extension_updater_unittest.cc
diff --git a/chrome/browser/extensions/extension_updater_unittest.cc b/chrome/browser/extensions/extension_updater_unittest.cc
index 572182afdfd4404f82c1aee6d1ff487dfc6b94d0..98a09d7b3ca6cc298370668cac73234a30b090d1 100644
--- a/chrome/browser/extensions/extension_updater_unittest.cc
+++ b/chrome/browser/extensions/extension_updater_unittest.cc
@@ -25,7 +25,6 @@
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/pref_names.h"
-#include "chrome/test/base/testing_browser_process_test.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/browser/browser_thread.h"
 #include "content/test/test_url_fetcher_factory.h"
@@ -287,7 +286,7 @@ static void ExtractParameters(const std::string& params,
 
 // All of our tests that need to use private APIs of ExtensionUpdater live
 // inside this class (which is a friend to ExtensionUpdater).
-class ExtensionUpdaterTest : public TestingBrowserProcessTest {
+class ExtensionUpdaterTest : public testing::Test {
  public:
   static void SimulateTimerFired(ExtensionUpdater* updater) {
     EXPECT_TRUE(updater->timer_.IsRunning());