For some vector icons, get the size from the vector definition.

ui/gfx/paint_vector_icon.cc

Index: ui/gfx/paint_vector_icon.cc
diff --git a/ui/gfx/paint_vector_icon.cc b/ui/gfx/paint_vector_icon.cc
index 91b00c9c507f95aefe283fa507a9d7707e29be13..afd30e34469ca546df766438bdbb642d7fd2c89a 100644
--- a/ui/gfx/paint_vector_icon.cc
+++ b/ui/gfx/paint_vector_icon.cc
@@ -394,6 +394,18 @@ ImageSkia CreateVectorIconWithBadge(VectorIconId id,
   return g_icon_cache.Get().GetOrCreateIcon(id, dip_size, color, badge_id);
 }
 
+ImageSkia CreatePrimaryVectorIcon(VectorIconId id, SkColor color) {
+  const PathElement* one_x_path = GetPathForVectorIconAt1xScale(id);
+#ifndef NDEBUG

[sky, 2015/10/13 20:15:06]

nit: if !defined(NDEBUG)

+  const PathElement* general_path = GetPathForVectorIcon(id);
+  DCHECK_NE(one_x_path, general_path);
+#endif
+  DCHECK_EQ(one_x_path[0].type, CANVAS_DIMENSIONS);
+
+  const size_t size = one_x_path[1].arg;
+  return CreateVectorIcon(id, size, color);
+}
+
 ImageSkia CreateVectorIconFromSource(const std::string& source,
                                      size_t dip_size,
                                      SkColor color) {