First pass at removing position:fixed.

sky/engine/core/rendering/compositing/CompositingInputsUpdater.cpp

 // Copyright 2014 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 "core/rendering/compositing/CompositingInputsUpdater.h"
 
 #include "core/rendering/RenderBlock.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/compositing/CompositedLayerMapping.h"
@@ skipping 15 matching lines @@
 void CompositingInputsUpdater::update()
 {
     TRACE_EVENT0("blink", "CompositingInputsUpdater::update");
     updateRecursive(m_rootRenderLayer, DoNotForceUpdate, AncestorInfo());
 }
 
 static const RenderLayer* findParentLayerOnClippingContainerChain(const RenderLayer* layer)
 {
     RenderObject* current = layer->renderer();
     while (current) {
-        if (current->style()->position() == FixedPosition) {
-            for (current = current->parent(); current && !current->canContainFixedPositionObjects(); current = current->parent()) {
-                // CSS clip applies to fixed position elements even for ancestors that are not what the
-                // fixed element is positioned with respect to.
-                if (current->hasClip()) {
-                    ASSERT(current->hasLayer());
-                    return static_cast<const RenderLayerModelObject*>(current)->layer();
-                }
-            }
-        } else {
-            current = current->containingBlock();
-        }
+        current = current->containingBlock();
 
         if (current->hasLayer())
             return static_cast<const RenderLayerModelObject*>(current)->layer();
         // Having clip or overflow clip forces the RenderObject to become a layer.
         ASSERT(!current->hasClipOrOverflowClip());
     }
     ASSERT_NOT_REACHED();
     return 0;
 }
 
@@ skipping 125 matching lines @@
     ASSERT(!layer->childNeedsCompositingInputsUpdate());
     ASSERT(!layer->needsCompositingInputsUpdate());
 
     for (RenderLayer* child = layer->firstChild(); child; child = child->nextSibling())
         assertNeedsCompositingInputsUpdateBitsCleared(child);
 }
 
 #endif
 
 } // namespace blink