Revert "Replace style sharing cousin list search with LRU"

Revert "Replace style sharing cousin list search with LRU"

This reverts commit ed002c01e93c3d9ee90fdf16d7461b149176c650.

Landing this as a speculative fix for the three perf regressions from
the listed bug.

TBR=ojan
BUG=286376
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=157383

[commit-bot: I haz the power, 2013-09-06 17:33:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/leviw@chromium.org/23701014/1

[commit-bot: I haz the power, 2013-09-06 17:33:53]

Failed to apply patch for Source/core/dom/ContainerNode.cpp:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file Source/core/dom/ContainerNode.cpp
  Hunk #2 FAILED at 72.
  1 out of 2 hunks FAILED -- saving rejects to file
Source/core/dom/ContainerNode.cpp.rej

Patch:       Source/core/dom/ContainerNode.cpp
Index: Source/core/dom/ContainerNode.cpp
diff --git a/Source/core/dom/ContainerNode.cpp
b/Source/core/dom/ContainerNode.cpp
index
e648d8f4f273c970bccbe54d877995643a01687e..552e3e29f9fae0602a398f6c177eee5746f492b4
100644
--- a/Source/core/dom/ContainerNode.cpp
+++ b/Source/core/dom/ContainerNode.cpp
@@ -25,7 +25,6 @@
 
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
-#include "core/css/resolver/StyleResolver.h"
 #include "core/dom/ChildListMutationScope.h"
 #include "core/dom/ContainerNodeAlgorithms.h"
 #include "core/dom/ElementTraversal.h"
@@ -73,9 +72,6 @@ static inline void attachAfterInsertion(Node* node,
AttachBehavior attachBehavio
         node->lazyAttach();
     else
         node->attach();
-
-    if (StyleResolver* resolver = node->document().styleResolverIfExists())
-        resolver->clearStyleSharingList();
 }
 
 static void collectChildrenAndRemoveFromOldParent(Node* node, NodeVector&
nodes, ExceptionState& es)

[commit-bot: I haz the power, 2013-09-06 17:38:09]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/leviw@chromium.org/23701014/5001

[commit-bot: I haz the power, 2013-09-06 18:01:32]

Sorry for I got bad news for ya.
Compile failed with a clobber build on linux_blink_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_blin...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-09-06 18:16:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/leviw@chromium.org/23701014/19001

[commit-bot: I haz the power, 2013-09-06 19:31:25]

Change committed as 157383