throughput: Update UMA name in telemetry.

The throughput metrics were renamed from Graphics.Smoothness.Throughput
to Graphics.Smoothness.PercentDroppedFrames in crrev.com/741484. Update
the rendering benchmark to report these renamed metrics.

BUG=1048780
TBR=xidachen@

Change-Id: I1fe717a69c106de930879b3344cac85bfdee9273
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2058792Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Auto-Submit: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741756}

tools/perf/benchmarks/rendering.py

@@ -25,18 +25,18 @@ RENDERING_BENCHMARK_UMA = [
     'Graphics.Smoothness.Checkerboarding.TouchScroll',
     'Graphics.Smoothness.Checkerboarding.Video',
     'Graphics.Smoothness.Checkerboarding.WheelScroll',
-    'Graphics.Smoothness.Throughput.AllAnimations',
-    'Graphics.Smoothness.Throughput.AllInteractions',
-    'Graphics.Smoothness.Throughput.AllSequences',
-    'Graphics.Smoothness.Throughput.MainThread.MainThreadAnimation',
-    'Graphics.Smoothness.Throughput.MainThread.PinchZoom',
-    'Graphics.Smoothness.Throughput.MainThread.RAF',
-    'Graphics.Smoothness.Throughput.MainThread.TouchScroll',
-    'Graphics.Smoothness.Throughput.MainThread.WheelScroll',
-    'Graphics.Smoothness.Throughput.CompositorThread.CompositorAnimation',
-    'Graphics.Smoothness.Throughput.CompositorThread.PinchZoom',
-    'Graphics.Smoothness.Throughput.CompositorThread.TouchScroll',
-    'Graphics.Smoothness.Throughput.CompositorThread.WheelScroll',
+    'Graphics.Smoothness.PercentDroppedFrames.AllAnimations',
+    'Graphics.Smoothness.PercentDroppedFrames.AllInteractions',
+    'Graphics.Smoothness.PercentDroppedFrames.AllSequences',
+    'Graphics.Smoothness.PercentDroppedFrames.MainThread.MainThreadAnimation',
+    'Graphics.Smoothness.PercentDroppedFrames.MainThread.PinchZoom',
+    'Graphics.Smoothness.PercentDroppedFrames.MainThread.RAF',
+    'Graphics.Smoothness.PercentDroppedFrames.MainThread.TouchScroll',
+    'Graphics.Smoothness.PercentDroppedFrames.MainThread.WheelScroll',
+    'Graphics.Smoothness.PercentDroppedFrames.CompositorThread.CompositorAnimation',
+    'Graphics.Smoothness.PercentDroppedFrames.CompositorThread.PinchZoom',
+    'Graphics.Smoothness.PercentDroppedFrames.CompositorThread.TouchScroll',
+    'Graphics.Smoothness.PercentDroppedFrames.CompositorThread.WheelScroll',
     'Memory.GPU.PeakMemoryUsage.Scroll',
     'Memory.GPU.PeakMemoryUsage.PageLoad',
 ]