Move Android metrics files into a /metrics/ subfolder/package.

chrome/browser/android/metrics/uma_bridge.h

Index: chrome/browser/android/metrics/uma_bridge.h
diff --git a/chrome/browser/android/uma_bridge.h b/chrome/browser/android/metrics/uma_bridge.h
similarity index 68%
rename from chrome/browser/android/uma_bridge.h
rename to chrome/browser/android/metrics/uma_bridge.h
index c68c841b8b5d6160f42da160ff8922349854c525..0badc05d143db95d6b71c168000f946673f44f96 100644
--- a/chrome/browser/android/uma_bridge.h
+++ b/chrome/browser/android/metrics/uma_bridge.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_ANDROID_UMA_BRIDGE_H_
-#define CHROME_BROWSER_ANDROID_UMA_BRIDGE_H_
+#ifndef CHROME_BROWSER_ANDROID_METRICS_UMA_BRIDGE_H_
+#define CHROME_BROWSER_ANDROID_METRICS_UMA_BRIDGE_H_
 
 #include <jni.h>
 
@@ -16,4 +16,4 @@ bool RegisterUmaBridge(JNIEnv* env);
 }  // namespace android
 }  // namespace chrome
 
-#endif  // CHROME_BROWSER_ANDROID_UMA_BRIDGE_H_
+#endif  // CHROME_BROWSER_ANDROID_METRICS_UMA_BRIDGE_H_