Add a new GetInstance() method for remaining files with singleton classes under chrome/browser.

chrome/browser/extensions/extension_test_api.cc

Index: chrome/browser/extensions/extension_test_api.cc
diff --git a/chrome/browser/extensions/extension_test_api.cc b/chrome/browser/extensions/extension_test_api.cc
index 7afd5ebc111b1aecf633c4e92beabb8f0c576a27..5d93deae5be80332104ab0a16668375d7a1393fa 100644
--- a/chrome/browser/extensions/extension_test_api.cc
+++ b/chrome/browser/extensions/extension_test_api.cc
@@ -93,17 +93,23 @@ void ExtensionTestSendMessageFunction::Reply(const std::string& message) {
 // static
 void ExtensionTestGetConfigFunction::set_test_config_state(
     DictionaryValue* value) {
-  TestConfigState* test_config_state = Singleton<TestConfigState>::get();
+  TestConfigState* test_config_state = TestConfigState::GetInstance();
   test_config_state->set_config_state(value);
 }
 
 ExtensionTestGetConfigFunction::TestConfigState::TestConfigState()
   : config_state_(NULL) {}
 
+// static
+ExtensionTestGetConfigFunction::TestConfigState*
+ExtensionTestGetConfigFunction::TestConfigState::GetInstance() {
+  return Singleton<TestConfigState>::get();
+}
+
 ExtensionTestGetConfigFunction::~ExtensionTestGetConfigFunction() {}
 
 bool ExtensionTestGetConfigFunction::RunImpl() {
-  TestConfigState* test_config_state = Singleton<TestConfigState>::get();
+  TestConfigState* test_config_state = TestConfigState::GetInstance();
 
   if (!test_config_state->config_state()) {
     error_ = kNoTestConfigDataError;