Refactor some vector icon parsing code for reuse

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 e8217e6ae36970d1ee399674e0ec19c6f99e6c1f..b18000b41fe304b8ade4ae9bdde408243741b068 100644
--- a/ui/gfx/vector_icon_types.h
+++ b/ui/gfx/vector_icon_types.h
@@ -64,11 +64,11 @@ enum CommandType {
 
 // A POD that describes either a path command or an argument for it.
 struct PathElement {
-  constexpr PathElement(CommandType value) : type(value) {}
+  constexpr PathElement(CommandType value) : command(value) {}
   constexpr PathElement(SkScalar value) : arg(value) {}
 
   union {
-    CommandType type;
+    CommandType command;
     SkScalar arg;
   };
 };