Remove will-change: contents GPU rasterization hint

Source/core/rendering/compositing/CompositingRequirementsUpdater.cpp

Index: Source/core/rendering/compositing/CompositingRequirementsUpdater.cpp
diff --git a/Source/core/rendering/compositing/CompositingRequirementsUpdater.cpp b/Source/core/rendering/compositing/CompositingRequirementsUpdater.cpp
index 4c7a9157f70046169d354e0994d48e0e6ba51faf..2bae2993c9e328e4df421a870c6215cba8e86630 100644
--- a/Source/core/rendering/compositing/CompositingRequirementsUpdater.cpp
+++ b/Source/core/rendering/compositing/CompositingRequirementsUpdater.cpp
@@ -163,7 +163,6 @@ public:
         , m_subtreeIsCompositing(false)
         , m_hasUnisolatedCompositedBlendingDescendant(false)
         , m_testingOverlap(testOverlap)
-        , m_suppressLayerCreation(false)
 #ifndef NDEBUG
         , m_depth(0)
 #endif
@@ -175,7 +174,6 @@ public:
         , m_subtreeIsCompositing(other.m_subtreeIsCompositing)
         , m_hasUnisolatedCompositedBlendingDescendant(other.m_hasUnisolatedCompositedBlendingDescendant)
         , m_testingOverlap(other.m_testingOverlap)
-        , m_suppressLayerCreation(other.m_suppressLayerCreation)
 #ifndef NDEBUG
         , m_depth(other.m_depth + 1)
 #endif
@@ -186,7 +184,6 @@ public:
     bool m_subtreeIsCompositing;
     bool m_hasUnisolatedCompositedBlendingDescendant;
     bool m_testingOverlap;
-    bool m_suppressLayerCreation;
 #ifndef NDEBUG
     int m_depth;
 #endif
@@ -202,11 +199,6 @@ static bool requiresCompositingOrSquashing(CompositingReasons reasons)
     return reasons != CompositingReasonNone;
 }
 
-static bool shouldMakeDescendantsSuppressCompositedLayerCreation(CompositingReasons reasons)
-{
-    return reasons & CompositingReasonWillChangeGpuRasterizationHint;
-}
-
 static CompositingReasons subtreeReasonsForCompositing(RenderObject* renderer, bool hasCompositedDescendants, bool has3DTransformedDescendants)
 {
     CompositingReasons subtreeReasons = CompositingReasonNone;
@@ -299,9 +291,6 @@ void CompositingRequirementsUpdater::updateRecursive(RenderLayer* ancestorLayer,
 
     // First accumulate the straightforward compositing reasons.
     CompositingReasons directReasons = m_compositingReasonFinder.directReasons(layer);
-    layer->setSuppressingCompositedLayerCreation(currentRecursionData.m_suppressLayerCreation);
-    if (layer->suppressingCompositedLayerCreation())
-        directReasons = m_compositingReasonFinder.suppressWillChangeAndAnimationForGpuRasterization(layer, directReasons);
 
     // Video is special. It's the only RenderLayer type that can both have
     // RenderLayer children and whose children can't use its backing to render
@@ -356,7 +345,6 @@ void CompositingRequirementsUpdater::updateRecursive(RenderLayer* ancestorLayer,
     // ancestor with m_subtreeIsCompositing set to false.
     RecursionData childRecursionData(currentRecursionData);
     childRecursionData.m_subtreeIsCompositing = false;
-    childRecursionData.m_suppressLayerCreation = layer->suppressingCompositedLayerCreation() || shouldMakeDescendantsSuppressCompositedLayerCreation(directReasons);
 
     bool willBeCompositedOrSquashed = compositor->canBeComposited(layer) && requiresCompositingOrSquashing(reasonsToComposite);
     if (willBeCompositedOrSquashed) {