cc: Reland "Add UMA stats for record and raster time."

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 4cf3a9a35ccedefa16c2fbfaaf756a93c53306d4..98d21815e409bfa6286fed768fce06819969cb5d 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -3542,6 +3542,25 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram
+    name="Compositing.DisplayListRecordingSource.UpdateInvalidatedAreaPerMs"
+    units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Area of invalidated content, in pixels, divided by update (i.e. record), in
+    milliseconds. Recorded when display list recording source is updated.
+  </summary>
+</histogram>
+
+<histogram name="Compositing.DisplayListRecordingSource.UpdateUs"
+    units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent updating (i.e. recording) a display list, in microseconds.
+    Recorded when display list is updated.
+  </summary>
+</histogram>
+
 <histogram name="Compositing.NumActiveLayers">
   <owner>dneto@chromium.org</owner>
   <summary>
@@ -3558,6 +3577,39 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Compositing.PicturePile.UpdateInvalidatedAreaPerMs"
+    units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Area of invalidated content, in pixels, divided by update (i.e. record), in
+    milliseconds. Recorded when picture pile is updated.
+  </summary>
+</histogram>
+
+<histogram name="Compositing.PicturePile.UpdateUs" units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent updating (i.e. recording) a picture pile, in microseconds.
+    Recorded when picture pile is updated.
+  </summary>
+</histogram>
+
+<histogram name="Compositing.RasterTask.RasterPixelsPerMs" units="pixels/ms">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Rasterized area, in pixels, divided by rasterization time, in milliseconds,
+    of a compositor rasterization task. Recorded after the task finishes.
+  </summary>
+</histogram>
+
+<histogram name="Compositing.RasterTask.RasterUs" units="microseconds">
+  <owner>paint-dev@chromium.org</owner>
+  <summary>
+    Time spent completing a compositor rasterization task, in microseconds.
+    Recorded after the task finishes.
+  </summary>
+</histogram>
+
 <histogram name="Compositing.RenderPass.AppendQuadData.NumIncompleteTiles">
   <owner>weiliangc@chromium.org.</owner>
   <summary>