Switch ChromeTestSuite to the same convention as ContentTestSuite:

chrome/test/base/testing_browser_process.cc

Index: chrome/test/base/testing_browser_process.cc
diff --git a/chrome/test/base/testing_browser_process.cc b/chrome/test/base/testing_browser_process.cc
index 315c2c28a6d1afb71fea6846c67fec2407e4d248..f86f6d5ebcd5bbc7bd0ae30af56aa83df6c59b27 100644
--- a/chrome/test/base/testing_browser_process.cc
+++ b/chrome/test/base/testing_browser_process.cc
@@ -271,13 +271,3 @@ void TestingBrowserProcess::SetIOThread(IOThread* io_thread) {
 void TestingBrowserProcess::SetDevToolsManager(DevToolsManager* manager) {
   devtools_manager_.reset(manager);
 }
-
-ScopedTestingBrowserProcess::ScopedTestingBrowserProcess() {
-  DCHECK(!g_browser_process);
-  g_browser_process = &browser_process_;
-}
-
-ScopedTestingBrowserProcess::~ScopedTestingBrowserProcess() {
-  DCHECK_EQ(&browser_process_, g_browser_process);
-  g_browser_process = NULL;
-}