Make scroll offset type of float in cc

cc/base/math_util.cc

 // Copyright 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 "cc/base/math_util.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 
@@ skipping 760 matching lines @@
   res->AppendInteger(v.x());
   res->AppendInteger(v.y());
 }
 
 void MathUtil::AddToTracedValue(const gfx::Vector2dF& v,
                                 base::debug::TracedValue* res) {
   res->AppendDouble(v.x());
   res->AppendDouble(v.y());
 }
 
+void MathUtil::AddToTracedValue(const gfx::ScrollOffset& v,
+                                base::debug::TracedValue* res) {
+  res->AppendDouble(v.x());
+  res->AppendDouble(v.y());
+}
+
 void MathUtil::AddToTracedValue(const gfx::QuadF& q,
                                 base::debug::TracedValue* res) {
   res->AppendDouble(q.p1().x());
   res->AppendDouble(q.p1().y());
   res->AppendDouble(q.p2().x());
   res->AppendDouble(q.p2().y());
   res->AppendDouble(q.p3().x());
   res->AppendDouble(q.p3().y());
   res->AppendDouble(q.p4().x());
   res->AppendDouble(q.p4().y());
@@ skipping 28 matching lines @@
 
 double MathUtil::AsDoubleSafely(double value) {
   return std::min(value, std::numeric_limits<double>::max());
 }
 
 float MathUtil::AsFloatSafely(float value) {
   return std::min(value, std::numeric_limits<float>::max());
 }
 
 }  // namespace cc