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

ui/gfx/size.h

Index: ui/gfx/size.h
diff --git a/ui/gfx/size.h b/ui/gfx/size.h
index edfc1fc9d2bd5f9d384d1cd799ba16c275cb1db8..f6152a3aa12f5ddc7af46eeaaed396283228d371 100644
--- a/ui/gfx/size.h
+++ b/ui/gfx/size.h
@@ -25,13 +25,13 @@ namespace gfx {
 // A size has width and height values.
 class UI_EXPORT Size : public SizeBase<Size, int> {
  public:
-  Size();
-  Size(int width, int height);
+  Size() : SizeBase<Size, int>(0, 0) {}
+  Size(int width, int height) : SizeBase<Size, int>(width, height) {}
 #if defined(OS_MACOSX)
   explicit Size(const CGSize& s);
 #endif
 
-  ~Size();
+  ~Size() {}
 
 #if defined(OS_MACOSX)
   Size& operator=(const CGSize& s);