Throttle rendering pipeline for invisible frames

third_party/WebKit/Source/web/tests/sim/SimCompositor.cpp

Index: third_party/WebKit/Source/web/tests/sim/SimCompositor.cpp
diff --git a/third_party/WebKit/Source/web/tests/sim/SimCompositor.cpp b/third_party/WebKit/Source/web/tests/sim/SimCompositor.cpp
index 59e393e21eb1d8240dd03aad55caf2be36ccf058..83dfb8e932a94c2c91f5f34e068786f117c00ebc 100644
--- a/third_party/WebKit/Source/web/tests/sim/SimCompositor.cpp
+++ b/third_party/WebKit/Source/web/tests/sim/SimCompositor.cpp
@@ -21,7 +21,7 @@ namespace blink {
 
 static void paintLayers(PaintLayer& layer, SimDisplayItemList& displayList)
 {
-    if (layer.compositingState() == PaintsIntoOwnBacking) {
+    if (layer.isAllowedToQueryCompositingState() && layer.compositingState() == PaintsIntoOwnBacking) {
         CompositedLayerMapping* mapping = layer.compositedLayerMapping();
         GraphicsLayer* graphicsLayer = mapping->mainGraphicsLayer();
         if (graphicsLayer->hasTrackedPaintInvalidations()) {
@@ -71,6 +71,7 @@ SimDisplayItemList SimCompositor::beginFrame()
     ASSERT(m_webViewImpl);
     ASSERT(!m_layerTreeView->deferCommits());
     ASSERT(m_layerTreeView->needsAnimate());
+    m_layerTreeView->clearNeedsAnimate();
 
     // Always advance the time as if the compositor was running at 60fps.
     m_lastFrameTimeMonotonic = monotonicallyIncreasingTime() + 0.016;
@@ -83,8 +84,6 @@ SimDisplayItemList SimCompositor::beginFrame()
     SimDisplayItemList displayList;
     paintFrames(*root, displayList);
 
-    m_layerTreeView->clearNeedsAnimate();
-
     return displayList;
 }