Reland crrev.com/8283cad74e0cad4840d1f with fix for static initializers.

ui/gfx/vector_icon_types.h

Index: ui/gfx/vector_icon_types.h
diff --git a/ui/gfx/vector_icon_types.h b/ui/gfx/vector_icon_types.h
index 8def67d2fcc7899a2cb28daa6242e2d8533f4728..e8217e6ae36970d1ee399674e0ec19c6f99e6c1f 100644
--- a/ui/gfx/vector_icon_types.h
+++ b/ui/gfx/vector_icon_types.h
@@ -64,8 +64,8 @@ enum CommandType {
 
 // A POD that describes either a path command or an argument for it.
 struct PathElement {
-  PathElement(CommandType value) : type(value) {}
-  PathElement(SkScalar value) : arg(value) {}
+  constexpr PathElement(CommandType value) : type(value) {}
+  constexpr PathElement(SkScalar value) : arg(value) {}
 
   union {
     CommandType type;
@@ -74,14 +74,10 @@ struct PathElement {
 };
 
 struct VectorIcon {
-  VectorIcon() : path_(nullptr), path_1x_(nullptr) {}
-  VectorIcon(gfx::PathElement* path, gfx::PathElement* path_1x)
-      : path_(path), path_1x_(path_1x) {}
-
   bool is_empty() const { return !path_; }
 
-  gfx::PathElement* path_;
-  gfx::PathElement* path_1x_;
+  const gfx::PathElement* path_;
+  const gfx::PathElement* path_1x_;
 };
 
 // Returns an array of path commands and arguments, terminated by END.