Inline hot ctor/dtors for struct-like gfx:: geometry types

ui/gfx/size_f.h

 // 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.
 
 #ifndef UI_GFX_SIZE_F_H_
 #define UI_GFX_SIZE_F_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "ui/base/ui_export.h"
 #include "ui/gfx/size_base.h"
 
 namespace gfx {
 
 // A floating version of gfx::Size.
 class UI_EXPORT SizeF : public SizeBase<SizeF, float> {
  public:
-  SizeF();
-  SizeF(float width, float height);
-  ~SizeF();
+  SizeF() : SizeBase<SizeF, float>(0, 0) {}
+  SizeF(float width, float height) : SizeBase<SizeF, float>(width, height) {}
+  ~SizeF() {}
 
   void Scale(float scale) {
     Scale(scale, scale);
   }
 
   void Scale(float x_scale, float y_scale) {
     SetSize(width() * x_scale, height() * y_scale);
   }
 
   std::string ToString() const;
@@ skipping 13 matching lines @@
   return ScaleSize(p, scale, scale);
 }
 
 #if !defined(COMPILER_MSVC)
 extern template class SizeBase<SizeF, float>;
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_SIZE_F_H_