Revert 137759

Source/WebCore/rendering/RenderBlock.cpp

Index: Source/WebCore/rendering/RenderBlock.cpp
===================================================================
--- Source/WebCore/rendering/RenderBlock.cpp	(revision 138968)
+++ Source/WebCore/rendering/RenderBlock.cpp	(working copy)
@@ -1334,8 +1334,8 @@
 
 void RenderBlock::startDelayUpdateScrollInfo()
 {
-    if (!gDelayedUpdateScrollInfoSet) {
-        ASSERT(!gDelayUpdateScrollInfo);
+    if (gDelayUpdateScrollInfo == 0) {
+        ASSERT(!gDelayedUpdateScrollInfoSet);
         gDelayedUpdateScrollInfoSet = new DelayedUpdateScrollInfoSet;
     }
     ASSERT(gDelayedUpdateScrollInfoSet);
@@ -1349,22 +1349,15 @@
     if (gDelayUpdateScrollInfo == 0) {
         ASSERT(gDelayedUpdateScrollInfoSet);
 
-        Vector<RenderBlock*> infoSet;
-        while (gDelayedUpdateScrollInfoSet && gDelayedUpdateScrollInfoSet->size()) {
-            copyToVector(*gDelayedUpdateScrollInfoSet, infoSet);
-            for (Vector<RenderBlock*>::iterator it = infoSet.begin(); it != infoSet.end(); ++it) {
-                RenderBlock* block = *it;
-                // |block| may have been destroyed at this point, but then it will have been removed from gDelayedUpdateScrollInfoSet.
-                if (gDelayedUpdateScrollInfoSet && gDelayedUpdateScrollInfoSet->contains(block)) {
-                    gDelayedUpdateScrollInfoSet->remove(block);
-                    if (block->hasOverflowClip())
-                        block->layer()->updateScrollInfoAfterLayout();
-                }
+        OwnPtr<DelayedUpdateScrollInfoSet> infoSet(adoptPtr(gDelayedUpdateScrollInfoSet));
+        gDelayedUpdateScrollInfoSet = 0;
+
+        for (DelayedUpdateScrollInfoSet::iterator it = infoSet->begin(); it != infoSet->end(); ++it) {
+            RenderBlock* block = *it;
+            if (block->hasOverflowClip()) {
+                block->layer()->updateScrollInfoAfterLayout();
             }
         }
-        delete gDelayedUpdateScrollInfoSet;
-        gDelayedUpdateScrollInfoSet = 0;
-        ASSERT(!gDelayUpdateScrollInfo);
     }
 }