Removed gfx::QuadF::operator =(const gfx::QuadF&) and let the compiler generate one

This function showed up as hot in the trace and should not have been explicitly implemented as non-inline (pushing the args for the function call costs as much as the copy itself so operator = should *never* not be inlined if it's just doing a normal copy)

BUG=175855


Review URL: https://chromiumcodereview.appspot.com/12250019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182148 0039d316-1c4b-4281-b951-d872f2087c98

ui/gfx/quad_f.cc

@@ -11,13 +11,6 @@
 
 namespace gfx {
 
-void QuadF::operator=(const QuadF& quad) {
-  p1_ = quad.p1_;
-  p2_ = quad.p2_;
-  p3_ = quad.p3_;
-  p4_ = quad.p4_;
-}
-
 void QuadF::operator=(const RectF& rect) {
   p1_ = PointF(rect.x(), rect.y());
   p2_ = PointF(rect.right(), rect.y());

ui/gfx/quad_f.h

@@ -30,7 +30,6 @@ class UI_EXPORT QuadF {
         p3_(rect.right(), rect.bottom()),
         p4_(rect.x(), rect.bottom()) {}
 
-  void operator=(const QuadF& quad);
   void operator=(const RectF& rect);
 
   void set_p1(const PointF& p) { p1_ = p; }