[Android] Support startup histogram.

chrome/common/android/startup_metric_utils_android.h

Index: chrome/common/android/startup_metric_utils_android.h
diff --git a/chrome/common/android/startup_metric_utils_android.h b/chrome/common/android/startup_metric_utils_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..db6ca6efb15792f4c2348135deaa534129655c13
--- /dev/null
+++ b/chrome/common/android/startup_metric_utils_android.h
@@ -0,0 +1,21 @@
+// Copyright 2013 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.
+
+#ifndef CHROME_COMMON_ANDROID_STARTUP_METRIC_UTILS_ANDROID_H_
+#define CHROME_COMMON_ANDROID_STARTUP_METRIC_UTILS_ANDROID_H_
+
+#include <jni.h>
+
+#include "base/time/time.h"
+
+namespace chrome {
+namespace android {
+
+base::Time GetMainEntryPointTime();
+bool RegisterStartupMetricUtils(JNIEnv* env);
+
+}  // namespace android
+}  // namespace chrome
+
+#endif  // CHROME_COMMON_ANDROID_STARTUP_METRIC_UTILS_ANDROID_H_