Refactors getting available color profiles code.

ash/display/display_info.h

Index: ash/display/display_info.h
diff --git a/ash/display/display_info.h b/ash/display/display_info.h
index d47ac374848a11ff14449281b6e77c9e85108dce..db5329b527e82f9070435dca4bf0587ffc8fdc43 100644
--- a/ash/display/display_info.h
+++ b/ash/display/display_info.h
@@ -163,14 +163,17 @@ class ASH_EXPORT DisplayInfo {
   // |available_color_profiles_|.
   void SetColorProfile(ui::ColorCalibrationProfile profile);
 
+  // Returns true if |profile| is in |available_color_profiles_|.
+  bool IsColorProfileAvailable(ui::ColorCalibrationProfile profile) const;
+
   const std::vector<ui::ColorCalibrationProfile>&
       available_color_profiles() const {
     return available_color_profiles_;
   }
 
   void set_available_color_profiles(
-      const std::vector<ui::ColorCalibrationProfile>& profiles) {
-    available_color_profiles_ = profiles;
+      std::vector<ui::ColorCalibrationProfile>& profiles) {
+    available_color_profiles_.swap(profiles);
   }
 
   // Returns a string representation of the DisplayInfo, excluding display