Inline gfx::Vector2d* ctors and integer conversions

ui/gfx/vector2d.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/vector2d.h"
 
 #include <cmath>
 
 #include "base/stringprintf.h"
 
 namespace gfx {
 
-Vector2d::Vector2d() : x_(0), y_(0) {
-}
-
-Vector2d::Vector2d(int x, int y) : x_(x), y_(y) {
-}
-
 bool Vector2d::IsZero() const {
   return x_ == 0 && y_ == 0;
 }
 
 void Vector2d::Add(const Vector2d& other) {
   x_ += other.x_;
   y_ += other.y_;
 }
 
 void Vector2d::Subtract(const Vector2d& other) {
   x_ -= other.x_;
   y_ -= other.y_;
 }
 
 int64 Vector2d::LengthSquared() const {
   return static_cast<int64>(x_) * x_ + static_cast<int64>(y_) * y_;
 }
 
 float Vector2d::Length() const {
   return static_cast<float>(std::sqrt(static_cast<double>(LengthSquared())));
 }
 
 std::string Vector2d::ToString() const {
   return base::StringPrintf("[%d %d]", x_, y_);
 }
 
 }  // namespace gfx