Add MobileUsingMenuBy* metric actions owner and remove an unused one.

chrome/browser/android/uma_bridge.cc

Index: chrome/browser/android/uma_bridge.cc
diff --git a/chrome/browser/android/uma_bridge.cc b/chrome/browser/android/uma_bridge.cc
index 614b626d837f8790e95649a2e4132383df723613..ab345bb45aa64e4590c6c4dc21b6337c1a9c8ba8 100644
--- a/chrome/browser/android/uma_bridge.cc
+++ b/chrome/browser/android/uma_bridge.cc
@@ -23,7 +23,7 @@ static void RecordUsingMenu(JNIEnv*,
                             jboolean is_dragging) {
   if (is_by_hw_button) {
     if (is_dragging) {
-      RecordAction(UserMetricsAction("MobileUsingMenuByHwButtonDragging"));

[Alexei Svitkine (slow), 2014/08/08 15:20:49]

According to the counts dashboard, we have seen samples for this action:

https://uma.googleplex.com/counts

So the new NOTREACHED() statement will be reached. (Unless some other code
changes since then.)

[Kibeom Kim (inactive), 2014/08/08 18:29:15]

I removed HW dragging code recently.

+      NOTREACHED() << "We do not support dragging for hardware menu button.";
     } else {
       RecordAction(UserMetricsAction("MobileUsingMenuByHwButtonTap"));
     }