MD text buttons - implement focus ring.

ui/gfx/geometry/insets_f.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/geometry/insets_f.h"
 
 #include "base/strings/stringprintf.h"
 
 namespace gfx {
 
-InsetsF::InsetsF() : InsetsF(0.f, 0.f, 0.f, 0.f) {}
+InsetsF::InsetsF() : InsetsF(0.f) {}
+
+InsetsF::InsetsF(float all) : InsetsF(all, all, all, all) {}
+
+InsetsF::InsetsF(float vertical, float horizontal)
+    : InsetsF(vertical, horizontal, vertical, horizontal) {}
 
 InsetsF::InsetsF(float top, float left, float bottom, float right)
     : top_(top), left_(left), bottom_(bottom), right_(right) {}
 
 InsetsF::~InsetsF() {}
 
 std::string InsetsF::ToString() const {
   // Print members in the same order of the constructor parameters.
   return base::StringPrintf("%f,%f,%f,%f", top(),  left(), bottom(), right());
 }
 
 }  // namespace gfx