Create windows for new app window bounds API

apps/size_constraints.h

 // Copyright 2014 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 APPS_SIZE_CONSTRAINTS_H_
 #define APPS_SIZE_CONSTRAINTS_H_
 
 #include "ui/gfx/geometry/size.h"
 
+namespace gfx {
+class Insets;
+}
+
 namespace apps {
 
 class SizeConstraints {
  public:
   // The value SizeConstraints uses to represent an unbounded width or height.
   // This is an enum so that it can be declared inline here.
   enum { kUnboundedSize = 0 };
 
   SizeConstraints();
   SizeConstraints(const gfx::Size& min_size, const gfx::Size& max_size);
   ~SizeConstraints();
 
+  // Adds frame insets to a size constraint.
+  static gfx::Size AddFrameToConstraints(const gfx::Size& size_constraints,
+                                         const gfx::Insets& frame_insets);
+
   // Returns the bounds with its size clamped to the min/max size.
   gfx::Size ClampSize(gfx::Size size) const;
 
   // When gfx::Size is used as a min/max size, a zero represents an unbounded
   // component. This method checks whether either component is specified.
   // Note we can't use gfx::Size::IsEmpty as it returns true if either width
   // or height is zero.
   bool HasMinimumSize() const;
   bool HasMaximumSize() const;
 
   // This returns true if all components are specified, and min and max are
   // equal.
   bool HasFixedSize() const;
 
   gfx::Size GetMaximumSize() const;
   gfx::Size GetMinimumSize() const;
 
   void set_minimum_size(const gfx::Size& min_size);
   void set_maximum_size(const gfx::Size& max_size);
 
  private:
   gfx::Size minimum_size_;
   gfx::Size maximum_size_;
 };
 
 }  // namespace apps
 
 #endif  // APPS_SIZE_CONSTRAINTS_H_