Disable some compositing state asserts seen on Mac builds

Test scenarios:
http://www.rbyers.net/eventTest.html - scrolling the page or div (has a wheel handler but doesn't call preventDefault)
Loading https://twitter.com/pwnall

BUG=343132

Review URL: https://codereview.chromium.org/180803012

git-svn-id: svn://svn.chromium.org/blink/trunk@168478 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/rendering/RenderBox.cpp

@@ -474,6 +474,9 @@ static inline bool frameElementAndViewPermitScroll(HTMLFrameElementBase* frameEl
 
 void RenderBox::scrollRectToVisible(const LayoutRect& rect, const ScrollAlignment& alignX, const ScrollAlignment& alignY)
 {
+    // Presumably the same issue as in setScrollTop. See crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     RenderBox* parentBox = 0;
     LayoutRect newRect = rect;
 
@@ -738,6 +741,9 @@ int RenderBox::instrinsicScrollbarLogicalWidth() const
 
 bool RenderBox::scroll(ScrollDirection direction, ScrollGranularity granularity, float delta)
 {
+    // Presumably the same issue as in setScrollTop. See crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     // Logical scroll is a higher level concept, all directions by here must be physical
     ASSERT(!isLogical(direction));
 

third_party/WebKit/Source/core/rendering/RenderLayerScrollableArea.cpp

@@ -146,21 +146,33 @@ GraphicsLayer* RenderLayerScrollableArea::layerForScrolling() const
 
 GraphicsLayer* RenderLayerScrollableArea::layerForHorizontalScrollbar() const
 {
+    // See crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     return m_box->hasCompositedLayerMapping() ? m_box->compositedLayerMapping()->layerForHorizontalScrollbar() : 0;
 }
 
 GraphicsLayer* RenderLayerScrollableArea::layerForVerticalScrollbar() const
 {
+    // See crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     return m_box->hasCompositedLayerMapping() ? m_box->compositedLayerMapping()->layerForVerticalScrollbar() : 0;
 }
 
 GraphicsLayer* RenderLayerScrollableArea::layerForScrollCorner() const
 {
+    // See crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     return m_box->hasCompositedLayerMapping() ? m_box->compositedLayerMapping()->layerForScrollCorner() : 0;
 }
 
 void RenderLayerScrollableArea::invalidateScrollbarRect(Scrollbar* scrollbar, const IntRect& rect)
 {
+    // See crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     if (scrollbar == m_vBar.get()) {
         if (GraphicsLayer* layer = layerForVerticalScrollbar()) {
             layer->setNeedsDisplayInRect(rect);

third_party/WebKit/Source/core/rendering/compositing/RenderLayerCompositor.cpp

@@ -1302,6 +1302,9 @@ void RenderLayerCompositor::rootFixedBackgroundsChanged()
     if (!supportsFixedRootBackgroundCompositing())
         return;
 
+    // crbug.com/343132.
+    DisableCompositingQueryAsserts disabler;
+
     // To avoid having to make the fixed root background layer fixed positioned to
     // stay put, we position it in the layer tree as follows:
     //