Fix alarms_api_unittest.cc on GCC 4.6.3 linux 64 with -Werror=uninitialized:

chrome/browser/extensions/api/alarms/alarms_api_unittest.cc

Index: chrome/browser/extensions/api/alarms/alarms_api_unittest.cc
diff --git a/chrome/browser/extensions/api/alarms/alarms_api_unittest.cc b/chrome/browser/extensions/api/alarms/alarms_api_unittest.cc
index b9d1f04fb2c53b8c91f3c3d629ded15d60c14bf2..4460c298467d063034552e3aaf7d1061e08ef400 100644
--- a/chrome/browser/extensions/api/alarms/alarms_api_unittest.cc
+++ b/chrome/browser/extensions/api/alarms/alarms_api_unittest.cc
@@ -277,7 +277,7 @@ TEST_F(ExtensionAlarmsTest, CreateDelayBelowMinimum) {
   const IPC::Message* warning = sink.GetUniqueMessageMatching(
       ExtensionMsg_AddMessageToConsole::ID);
   ASSERT_TRUE(warning);
-  content::ConsoleMessageLevel level;
+  content::ConsoleMessageLevel level = content::CONSOLE_MESSAGE_LEVEL_TIP;
   std::string message;
   ExtensionMsg_AddMessageToConsole::Read(warning, &level, &message);
   EXPECT_EQ(content::CONSOLE_MESSAGE_LEVEL_WARNING, level);