Add histograms for ICC profile parsing

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 00516232f1f909153184acf573263a89bae8a4dc..1a0a0a1e124fb2fefa6d5244b085e4b8c47bde88 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -4275,6 +4275,22 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Gamma properties of destination color space.</summary>
 </histogram>
 
+<histogram name="Blink.ColorSpace.Destination.Matrix" units="Boolean">

[Ilya Sherman, 2017/01/18 01:18:15]

Please use a custom enum (just within this file), with labels like "No matrix"
and "Extracted to-XYZD50 matrix"; similarly below.

[Ilya Sherman, 2017/01/18 01:18:15]

nit: s/units/enum (ditto below)

+  <owner>ccameron@chromium.org</owner>
+  <summary>
+    True if the to-XYZD50 matrix was extracted from the output color space ICC
+    profile.
+  </summary>
+</histogram>
+
+<histogram name="Blink.ColorSpace.Destination.Numerical" units="Boolean">
+  <owner>ccameron@chromium.org</owner>
+  <summary>
+    True if the output color space ICC profile has a numerical transfer
+    function.
+  </summary>
+</histogram>
+
 <histogram name="Blink.ColorSpace.Source" enum="Gamma">
   <owner>ccameron@chromium.org</owner>
   <summary>Gamma properties of image color space.</summary>