ui: Add methods to clamp Sizes, Points, and Vectors from above or below.

cc/layer_impl.cc

 // Copyright 2011 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 "config.h"
 
 #include "cc/layer_impl.h"
 
 #include "base/debug/trace_event.h"
 #include "base/stringprintf.h"
@@ skipping 166 matching lines @@
     NOTREACHED();
     return 0;
 }
 
 gfx::Vector2dF LayerImpl::scrollBy(const gfx::Vector2dF& scroll)
 {
     gfx::Vector2dF minDelta = -m_scrollOffset;
     gfx::Vector2dF maxDelta = m_maxScrollOffset - m_scrollOffset;
     // Clamp newDelta so that position + delta stays within scroll bounds.
     gfx::Vector2dF newDelta = (m_scrollDelta + scroll);
-    newDelta = ClampFromBelow(newDelta, minDelta);
-    newDelta = ClampFromAbove(newDelta, maxDelta);
+    newDelta.ClampToMin(minDelta);
+    newDelta.ClampToMax(maxDelta);
     gfx::Vector2dF unscrolled = m_scrollDelta + scroll - newDelta;
 
     if (m_scrollDelta == newDelta)
         return unscrolled;
 
     m_scrollDelta = newDelta;
     if (m_scrollbarAnimationController)
         m_scrollbarAnimationController->updateScrollOffset(this);
     noteLayerPropertyChangedForSubtree();
 
@@ skipping 502 matching lines @@
 
 void LayerImpl::setVerticalScrollbarLayer(ScrollbarLayerImpl* scrollbarLayer)
 {
     if (!m_scrollbarAnimationController)
         m_scrollbarAnimationController = ScrollbarAnimationController::create(this);
     m_scrollbarAnimationController->setVerticalScrollbarLayer(scrollbarLayer);
     m_scrollbarAnimationController->updateScrollOffset(this);
 }
 
 }  // namespace cc