Rename Event.Latency.* to Event.Latency.ScrollUpdate.*

content/browser/renderer_host/input/render_widget_host_latency_tracker.cc

Index: content/browser/renderer_host/input/render_widget_host_latency_tracker.cc
diff --git a/content/browser/renderer_host/input/render_widget_host_latency_tracker.cc b/content/browser/renderer_host/input/render_widget_host_latency_tracker.cc
index a4d5ba9e71084a8e61e6885a39b1dfb351528071..a8d3ac23f52d9612d76f3b27e9185f8c9c04e02b 100644
--- a/content/browser/renderer_host/input/render_widget_host_latency_tracker.cc
+++ b/content/browser/renderer_host/input/render_widget_host_latency_tracker.cc
@@ -255,7 +255,7 @@ void ComputeTouchAndWheelScrollLatencyHistograms(
     // first scroll event in a sequence and the original timestamp of that
     // scroll event's underlying touch/wheel event.
     UMA_HISTOGRAM_TOUCH_WHEEL_TO_SCROLL_LATENCY(
-        "Event.Latency." + event_type_name +
+        "Event.Latency.ScrollUpdate." + event_type_name +
             ".TimeToFirstScrollUpdateSwapBegin2",
         original_component, gpu_swap_begin_component);
   } else if (latency.FindLatency(
@@ -266,7 +266,8 @@ void ComputeTouchAndWheelScrollLatencyHistograms(
     // First scroll events are excluded from this metric.
     if (event_type_name == "Touch") {
       UMA_HISTOGRAM_TOUCH_WHEEL_TO_SCROLL_LATENCY(
-          "Event.Latency." + event_type_name + ".TimeToScrollUpdateSwapBegin2",
+          "Event.Latency.ScrollUpdate." + event_type_name +
+              ".TimeToScrollUpdateSwapBegin2",
           original_component, gpu_swap_begin_component);
     }
   } else {