Fix license headers in a number of files

chrome/browser/metrics/metrics_response_unittest.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "chrome/browser/metrics/metrics_response.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "base/string_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 87 matching lines @@
   }
 }
 
 static const char* bogus_responses[] = {"", "<respo"};
 TEST(MetricsResponseTest, ParseBogusResponse) {
   for (size_t i = 0; i < arraysize(bogus_responses); ++i) {
     MetricsResponse response(bogus_responses[i]);
     EXPECT_FALSE(response.valid());
   }
 }