ui: Add methods to Rect classes to get points at each of the rect's corners.

cc/page_scale_animation.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/page_scale_animation.h"
 
 #include "base/logging.h"
-#include "cc/geometry.h"
 #include "ui/gfx/point_f.h"
 #include "ui/gfx/rect_f.h"
 #include "ui/gfx/vector2d_conversions.h"
 
 #include <math.h>
 
 namespace {
 
 // This takes a viewport-relative vector and returns a vector whose values are
 // between 0 and 1, representing the percentage position within the viewport.
@@ skipping 91 matching lines @@
     // where both anchor and normalized begin as unknowns. Solving
     // for the normalized, we get the following:
     float widthScale = 1 / (targetViewportSize().width() - startViewportSize().width());
     float heightScale = 1 / (targetViewportSize().height() - startViewportSize().height());
     gfx::Vector2dF normalized = gfx::ScaleVector2d(m_startScrollOffset - m_targetScrollOffset, widthScale, heightScale);
     m_targetAnchor = m_targetScrollOffset + denormalizeToViewport(normalized, targetViewportSize());
 }
 
 void PageScaleAnimation::clampTargetScrollOffset()
 {
-    gfx::Vector2dF maxScrollOffset = BottomRight(gfx::RectF(m_rootLayerSize)) - BottomRight(gfx::RectF(targetViewportSize()));
+    gfx::Vector2dF maxScrollOffset = gfx::RectF(m_rootLayerSize).BottomRight() - gfx::RectF(targetViewportSize()).BottomRight();
     m_targetScrollOffset.ClampToMin(gfx::Vector2dF());
     m_targetScrollOffset.ClampToMax(maxScrollOffset);
 }
 
 gfx::SizeF PageScaleAnimation::startViewportSize() const
 {
     return gfx::ScaleSize(m_viewportSize, 1 / m_startPageScaleFactor);
 }
 
 gfx::SizeF PageScaleAnimation::targetViewportSize() const
@@ skipping 65 matching lines @@
 
     // Linearly interpolate the magnitude in log scale.
     float diff = m_targetPageScaleFactor / m_startPageScaleFactor;
     float logDiff = log(diff);
     logDiff *= interp;
     diff = exp(logDiff);
     return m_startPageScaleFactor * diff;
 }
 
 }  // namespace cc