gfx: Fix ToEnclosing/ToEnclosed math to deal with big numbers.

ui/gfx/geometry/rect.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/geometry/rect.h"
 
 #include <algorithm>
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(OS_IOS)
 #include <CoreGraphics/CoreGraphics.h>
 #elif defined(OS_MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "ui/gfx/geometry/insets.h"
+#include "ui/gfx/geometry/rect_conversions.h"
 
 namespace gfx {
 
 #if defined(OS_WIN)
 Rect::Rect(const RECT& r)
     : origin_(r.left, r.top),
       size_(std::abs(r.right - r.left), std::abs(r.bottom - r.top)) {
 }
 #elif defined(OS_MACOSX)
 Rect::Rect(const CGRect& r)
@@ skipping 245 matching lines @@
 }
 
 Rect BoundingRect(const Point& p1, const Point& p2) {
   int rx = std::min(p1.x(), p2.x());
   int ry = std::min(p1.y(), p2.y());
   int rr = std::max(p1.x(), p2.x());
   int rb = std::max(p1.y(), p2.y());
   return Rect(rx, ry, rr - rx, rb - ry);
 }
 
+Rect SafelyScaleToEnclosingRect(const Rect& rect, float scale) {
+  return ToEnclosingRect(ScaleRect(rect, scale));
+}
+
 }  // namespace gfx