Color: Don't duplicate ICC profile data

ui/gfx/color_space.h

Index: ui/gfx/color_space.h
diff --git a/ui/gfx/color_space.h b/ui/gfx/color_space.h
index 0129e7e1cb4282c8ac765a927293bf19455c0afd..44a85eb4a761a7d8457ef00635d0d01183430bd5 100644
--- a/ui/gfx/color_space.h
+++ b/ui/gfx/color_space.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
 #include "build/build_config.h"
 #include "ui/gfx/gfx_export.h"
 
@@ -25,6 +26,7 @@ class GFX_EXPORT ColorSpace {
   ColorSpace& operator=(const ColorSpace& other);
   ~ColorSpace();
   bool operator==(const ColorSpace& other) const;
+  bool operator<(const ColorSpace& other) const;
 
   // Returns the color profile of the monitor that can best represent color.
   // This profile should be used for creating content that does not know on
@@ -35,7 +37,7 @@ class GFX_EXPORT ColorSpace {
   static ColorSpace FromCGColorSpace(CGColorSpaceRef cg_color_space);
 #endif
 
-  const std::vector<char>& GetICCProfile() const { return icc_profile_; }
+  const std::vector<char>& GetICCProfile() const;
 
 #if defined(OS_WIN)
   // This will read monitor ICC profiles from disk and cache the results for the
@@ -47,7 +49,20 @@ class GFX_EXPORT ColorSpace {
   static bool IsValidProfileLength(size_t length);
 
  private:
-  std::vector<char> icc_profile_;
+  struct Key;
+  class GlobalData;
+  friend struct Key;
+  friend class GlobalData;
+  enum class Type {
+    UNDEFINED,
+    ICC_PROFILE,
+  };
+  Type type_ = Type::UNDEFINED;
+
+  // GlobalData stores large or expensive-to-compute data about a color space
+  // (e.g, ICC profile). This structure is shared by all identical ColorSpace
+  // objects in the process. It is lazily initialized for named color spaces.
+  mutable scoped_refptr<GlobalData> global_data_;
 };
 
 }  // namespace gfx