Merge 113677 - [chromium] Viewport is not filled when out of texture memory on mac

Source/WebCore/platform/graphics/chromium/cc/CCLayerImpl.cpp

Index: Source/WebCore/platform/graphics/chromium/cc/CCLayerImpl.cpp
===================================================================
--- Source/WebCore/platform/graphics/chromium/cc/CCLayerImpl.cpp	(revision 114754)
+++ Source/WebCore/platform/graphics/chromium/cc/CCLayerImpl.cpp	(working copy)
@@ -50,7 +50,6 @@
     , m_scrollable(false)
     , m_shouldScrollOnMainThread(false)
     , m_haveWheelEventHandlers(false)
-    , m_backgroundCoversViewport(false)
     , m_doubleSided(true)
     , m_layerPropertyChanged(false)
     , m_masksToBounds(false)
@@ -136,43 +135,6 @@
     return CCSharedQuadState::create(quadTransform(), drawTransform(), visibleLayerRect(), layerClipRect, drawOpacity(), opaque());
 }
 
-void CCLayerImpl::appendQuads(CCQuadCuller& quadList, const CCSharedQuadState* sharedQuadState, bool&)
-{
-    appendGutterQuads(quadList, sharedQuadState);
-}
-
-void CCLayerImpl::appendGutterQuads(CCQuadCuller& quadList, const CCSharedQuadState* sharedQuadState)
-{
-    if (!backgroundCoversViewport() || !backgroundColor().isValid())
-        return;
-
-    const IntRect& layerRect = visibleLayerRect();
-    IntRect clip = screenSpaceTransform().inverse().mapRect(clipRect());
-
-    if (layerRect.isEmpty()) {
-        quadList.append(CCSolidColorDrawQuad::create(sharedQuadState, clip, backgroundColor()));
-        return;
-    }
-
-    IntRect gutterRects[4];
-    for (int i = 0; i < 4; i++)
-        gutterRects[i] = clip;
-    gutterRects[0].shiftMaxYEdgeTo(layerRect.y());
-    gutterRects[1].shiftYEdgeTo(layerRect.maxY());
-    gutterRects[2].shiftMaxXEdgeTo(layerRect.x());
-    gutterRects[3].shiftXEdgeTo(layerRect.maxX());
-
-    gutterRects[2].shiftYEdgeTo(layerRect.y());
-    gutterRects[3].shiftYEdgeTo(layerRect.y());
-    gutterRects[2].shiftMaxYEdgeTo(layerRect.maxY());
-    gutterRects[3].shiftMaxYEdgeTo(layerRect.maxY());
-
-    for (int i = 0; i < 4; i++) {
-        if (!gutterRects[i].isEmpty())
-            quadList.append(CCSolidColorDrawQuad::create(sharedQuadState, gutterRects[i], backgroundColor()));
-    }
-}
-
 void CCLayerImpl::appendDebugBorderQuad(CCQuadCuller& quadList, const CCSharedQuadState* sharedQuadState) const
 {
     if (!hasDebugBorders())
@@ -392,15 +354,6 @@
     m_layerPropertyChanged = true;
 }
 
-void CCLayerImpl::setBackgroundCoversViewport(bool backgroundCoversViewport)
-{
-    if (m_backgroundCoversViewport == backgroundCoversViewport)
-        return;
-
-    m_backgroundCoversViewport = backgroundCoversViewport;
-    m_layerPropertyChanged = true;
-}
-
 void CCLayerImpl::setFilters(const FilterOperations& filters)
 {
     if (m_filters == filters)
@@ -552,6 +505,13 @@
     noteLayerPropertyChangedForSubtree();
 }
 
+Region CCLayerImpl::visibleContentOpaqueRegion() const
+{
+    if (opaque())
+        return visibleLayerRect();
+    return Region();
+}
+
 void CCLayerImpl::didLoseContext()
 {
 }