ui: Remove gfx::Size::ClampToNonNegative, prevent negative sizes always.

ui/gfx/size.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/size.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
-#include "base/logging.h"
 #include "base/stringprintf.h"
-#include "ui/gfx/size_base.h"
+#include "ui/gfx/size_base_impl.h"
 
 namespace gfx {
 
 template class SizeBase<Size, int>;
 
 #if defined(OS_MACOSX)
-Size::Size(const CGSize& s) : SizeBase<Size, int>(0, 0) {
-  set_width(s.width);
-  set_height(s.height);
+Size::Size(const CGSize& s)
+    : SizeBase<Size, int>(s.width, s.height) {
 }
 
 Size& Size::operator=(const CGSize& s) {
   set_width(s.width);
   set_height(s.height);
   return *this;
 }
 #endif
 
 #if defined(OS_WIN)
 SIZE Size::ToSIZE() const {
   SIZE s;
   s.cx = width();
   s.cy = height();
   return s;
 }
 #elif defined(OS_MACOSX)
 CGSize Size::ToCGSize() const {
   return CGSizeMake(width(), height());
 }
 #endif
 
 std::string Size::ToString() const {
   return base::StringPrintf("%dx%d", width(), height());
 }
 
 }  // namespace gfx