Adds UMA for display color calibration in ChromeOS.

ui/display/chromeos/output_configurator.cc

Index: ui/display/chromeos/output_configurator.cc
diff --git a/ui/display/chromeos/output_configurator.cc b/ui/display/chromeos/output_configurator.cc
index cd95866f00aa168b986c92cbf0b9a52c0eef2923..f0679ee6bc5c8bd633d7eea80ab2819e09c99ac9 100644
--- a/ui/display/chromeos/output_configurator.cc
+++ b/ui/display/chromeos/output_configurator.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "base/logging.h"
+#include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
@@ -399,8 +400,15 @@ bool OutputConfigurator::SetColorCalibrationProfile(
   for (size_t i = 0; i < cached_outputs_.size(); ++i) {
     if (cached_outputs_[i].display &&
         cached_outputs_[i].display->display_id() == display_id) {
-      return native_display_delegate_->SetColorCalibrationProfile(
+      bool succeed = native_display_delegate_->SetColorCalibrationProfile(
           *cached_outputs_[i].display, new_profile);
+      if (succeed) {
+        UMA_HISTOGRAM_ENUMERATION(
+            "ChromeOS.Display.ColorProfile",
+            new_profile,
+            COLOR_PROFILE_READING + 1);

[Alexei Svitkine (slow), 2014/03/26 13:02:10]

Can you add a new enum at the end for the size instead of adding 1 to some enum?
(Else if there's a new enum value added, this won't be correct anymore.)

[Jun Mukai, 2014/03/26 18:08:09]

Done.

+      }
+      return succeed;
     }
   }