cc: Add UMA for tracking decode duration for out of raster decodes.

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 3cb4e1df495072edb9f3a50c9caa48d1d4a48e68..6c6527ebc1c5b3e176805d08f62fc8626346ebd5 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -58701,6 +58701,36 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 <histogram name="Renderer4.ImageDecodeTaskDurationUs" units="microseconds">
   <owner>vmpstr@chromium.org</owner>
   <summary>
+    This metric records the duration of an image decode for the raster path in
+    the compositor. It is recorded every time we decode an image. It is suffixed
+    by the type of rasterization we're in (either Gpu or Software).
+  </summary>
+</histogram>
+
+<histogram name="Renderer4.ImageDecodeTaskDurationUs.CheckerImaging"
+    units="microseconds">
+  <owner>vmpstr@chromium.org, khushalsagar@chromium.org</owner>
+  <summary>
+    This metric records the duration of an image decode for checker-imaging path
+    in the compositor. It is recorded every time we decode an image. It is
+    suffixed by the type of rasterization we're in (either Gpu or Software).
+  </summary>
+</histogram>
+
+<histogram name="Renderer4.ImageDecodeTaskDurationUs.JSDecode"
+    units="microseconds">
+  <owner>vmpstr@chromium.org, khushalsagar@chromium.org</owner>
+  <summary>
+    This metric records the duration of an image decode for the JS predecode API
+    in the compositor. It is recorded every time we decode an image. It is
+    suffixed by the type of rasterization we're in (either Gpu or Software).
+  </summary>
+</histogram>
+
+<histogram name="Renderer4.ImageDecodeTaskJSDecodeAPIDurationUs"
+    units="microseconds">
+  <owner>vmpstr@chromium.org</owner>
+  <summary>
     This metric records the duration of an image decode in the compositor. It is
     recorded every time we decode an image. It is suffixed by the type of
     rasterization we're in (either Gpu or Software).
@@ -91215,6 +91245,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
       name="Compositing.Renderer.RasterTask.RasterPixelsPerMs2"/>
   <affected-histogram name="Compositing.Renderer.RasterTask.RasterUs"/>
   <affected-histogram name="Renderer4.ImageDecodeTaskDurationUs"/>
+  <affected-histogram
+      name="Renderer4.ImageDecodeTaskDurationUs.CheckerImaging"/>
+  <affected-histogram name="Renderer4.ImageDecodeTaskDurationUs.JSDecode"/>
 </histogram_suffixes>
 
 <histogram_suffixes name="ReferrerAttribution" separator=".">