Image decode color: Push color profile from browser to renderer

ui/gfx/color_profile.h

Index: ui/gfx/color_profile.h
diff --git a/ui/gfx/color_profile.h b/ui/gfx/color_profile.h
index 7bd5d443eccb2315b911bc3e85817aad67043a88..dfbea5742b21ab54aa6cde2612006268e4e60bba 100644
--- a/ui/gfx/color_profile.h
+++ b/ui/gfx/color_profile.h
@@ -22,8 +22,7 @@ static const size_t kMaxProfileLength = 4 * 1024 * 1024;
 
 class GFX_EXPORT ColorProfile {
  public:
-  // On Windows, this reads a file from disk so it should not be run on the UI
-  // or IO thread.
+  // Creates a color profile for the system's primary monitor.

[ccameron, 2016/03/15 06:02:24]

This should be a function called GetPrimaryDisplayColorProfile(), not a default
constructor.

I will fix that in the upcoming refactor (for now, I'm leaving it as-is, modulo
allowing IO/UI thread access because Windows is now reading cached data).

   ColorProfile();
   ~ColorProfile();
 
@@ -39,10 +38,17 @@ inline bool InvalidColorProfileLength(size_t length) {
   return (length < kMinProfileLength) || (length > kMaxProfileLength);
 }
 
-// Return the color profile of the display nearest the screen bounds. On Win32,
-// this may read a file from disk so it should not be run on the UI/IO threads.
-// If the given bounds are empty, or are off-screen, return false meaning there
-// is no color profile associated with the bounds.  Otherwise return true after
+#if defined(OS_WIN)
+// On Windows, color profile data is read from a file on disk, which may take an
+// arbitrarily long time to run. This function will update all displays' color
+// profiles. It should not be called on the UI or IO threads. The functions to
+// query color profiles will read the data cached by this function.
+void GFX_EXPORT UpdateDisplayColorProfileCache();
+#endif
+
+// Return the color profile of the display nearest the screen bounds. If the
+// given bounds are empty, or are off-screen, return false meaning there is no
+// color profile associated with the bounds.  Otherwise return true after
 // storing the display's color profile in |profile|, which will be empty if the
 // standard sRGB color profile should be assumed.
 GFX_EXPORT bool GetDisplayColorProfile(const gfx::Rect& bounds,