Split up software and gpu raster time UMA stats

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 9feb3ec0d329b18716865e75508cb92ee9709ac2..30651a0a1505f78bd9858b597f75f9308e5c375c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -6379,6 +6379,25 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Compositing.Browser.RasterTask.GpuRasterPixelsPerMs"
+    units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Rasterized area, in pixels, divided by rasterization time, in milliseconds,
+    of a compositor gpu rasterization task. Recorded after the task finishes (in
+    a browser process).
+  </summary>
+</histogram>
+
+<histogram name="Compositing.Browser.RasterTask.GpuRasterUs"
+    units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent completing a compositor gpu rasterization task, in microseconds.
+    Recorded after the task finishes (in a browser process).
+  </summary>
+</histogram>
+
 <histogram name="Compositing.Browser.RasterTask.RasterPixelsPerMs"
     units="pixels/ms">
   <owner>paint-dev@chromium.org</owner>
@@ -6397,6 +6416,25 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Compositing.Browser.RasterTask.SoftwareRasterPixelsPerMs"
+    units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Rasterized area, in pixels, divided by rasterization time, in milliseconds,
+    of a compositor software rasterization task. Recorded after the task
+    finishes (in a browser process).
+  </summary>
+</histogram>
+
+<histogram name="Compositing.Browser.RasterTask.SoftwareRasterUs"
+    units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent completing a compositor software rasterization task, in
+    microseconds.  Recorded after the task finishes (in a browser process).
+  </summary>
+</histogram>
+
 <histogram
     name="Compositing.Browser.RenderPass.AppendQuadData.NumMissingTilesNoImageContent">
   <obsolete>
@@ -6630,6 +6668,25 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Compositing.Renderer.RasterTask.GpuRasterPixelsPerMs"
+    units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Rasterized area, in pixels, divided by rasterization time, in milliseconds,
+    of a compositor gpu rasterization task. Recorded after the task finishes (in
+    a renderer process).
+  </summary>
+</histogram>
+
+<histogram name="Compositing.Renderer.RasterTask.GpuRasterUs"
+    units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent completing a compositor gpu rasterization task, in microseconds.
+    Recorded after the task finishes (in a renderer process).
+  </summary>
+</histogram>
+
 <histogram name="Compositing.Renderer.RasterTask.RasterPixelsPerMs"
     units="pixels/ms">
   <owner>paint-dev@chromium.org</owner>
@@ -6648,6 +6705,25 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Compositing.Renderer.RasterTask.SoftwareRasterPixelsPerMs"
+    units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Rasterized area, in pixels, divided by rasterization time, in milliseconds,
+    of a compositor software rasterization task. Recorded after the task
+    finishes (in a renderer process).
+  </summary>
+</histogram>
+
+<histogram name="Compositing.Renderer.RasterTask.SoftwareRasterUs"
+    units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent completing a compositor software rasterization task, in
+    microseconds.  Recorded after the task finishes (in a renderer process).
+  </summary>
+</histogram>

[Ilya Sherman, 2016/10/03 20:59:11]

One advantage of making ".Software" and ".Gpu" be the last bits of the histogram
names is that you can use a histogram_suffixes element to reduce the amount of
repetition in this file.

+
 <histogram
     name="Compositing.Renderer.RenderPass.AppendQuadData.NumMissingTilesNoImageContent">
   <obsolete>