color: Initialize all members of gfx::ColorSpace

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 b7b93786a55309b9e54596ab68498093c01a4d19..6e351899e16fe3f4523a17f571c6e873d5eb6e26 100644
--- a/ui/gfx/color_space.h
+++ b/ui/gfx/color_space.h
@@ -133,10 +133,10 @@ class GFX_EXPORT ColorSpace {
   bool operator<(const ColorSpace& other) const;
 
  private:
-  PrimaryID primaries_;
-  TransferID transfer_;
-  MatrixID matrix_;
-  RangeID range_;
+  PrimaryID primaries_ = PrimaryID::UNSPECIFIED;
+  TransferID transfer_ = TransferID::UNSPECIFIED;
+  MatrixID matrix_ = MatrixID::UNSPECIFIED;
+  RangeID range_ = RangeID::LIMITED;
 
   // Only used if primaries_ == PrimaryID::CUSTOM
   float custom_primary_matrix_[12];