patch from issue 1063083002 at patchset 20001 (http://crrev.com/1063083002#ps20001)

Source/core/dom/Text.cpp

Index: Source/core/dom/Text.cpp
diff --git a/Source/core/dom/Text.cpp b/Source/core/dom/Text.cpp
index d48c27e8cd5c3a82c78f874b84b63c0c2e0b9177..75c7e9b84acc865595d502dbc42f1f78f1e6f028 100644
--- a/Source/core/dom/Text.cpp
+++ b/Source/core/dom/Text.cpp
@@ -42,48 +42,13 @@
 
 namespace blink {
 
-#if ENABLE(OILPAN)
-namespace {
-// If the external string kept by a Text node exceed this threshold length,
-// Oilpan is informed. External allocation amounts owned by heap objects are
-// taken into account when scheduling urgent Oilpan GCs.
-//
-// FIXME: having only Text nodes with strings above an ad-hoc local threshold
-// influence Oilpan's GC behavior isn't a satisfactory long-term solution.
-// But code that allocates a lot of Text nodes in tight loops, and not much more,
-// we do have to trigger Oilpan GCs to avoid PartitionAlloc OOMs. The accounting
-// does add overhead on the allocation of every Text node however, so for now, only
-// register those above the given threshold. TBC.
-const size_t stringLengthThreshold = 256;
-
-void increaseExternallyAllocatedBytesIfNeeded(size_t length)
-{
-    if (length > stringLengthThreshold)
-        Heap::increaseExternallyAllocatedBytes(length);
-}
-
-void increaseExternallyAllocatedBytesAliveIfNeeded(size_t length)
-{
-    if (length > stringLengthThreshold)
-        Heap::increaseExternallyAllocatedBytesAlive(length);
-}
-
-} // namespace
-#endif
-
 PassRefPtrWillBeRawPtr<Text> Text::create(Document& document, const String& data)
 {
-#if ENABLE(OILPAN)
-    increaseExternallyAllocatedBytesIfNeeded(data.length());
-#endif
     return adoptRefWillBeNoop(new Text(document, data, CreateText));
 }
 
 PassRefPtrWillBeRawPtr<Text> Text::createEditingText(Document& document, const String& data)
 {
-#if ENABLE(OILPAN)
-    increaseExternallyAllocatedBytesIfNeeded(data.length());
-#endif
     return adoptRefWillBeNoop(new Text(document, data, CreateEditingText));
 }
 
@@ -445,9 +410,6 @@ PassRefPtrWillBeRawPtr<Text> Text::cloneWithData(const String& data)
 
 DEFINE_TRACE(Text)
 {
-#if ENABLE(OILPAN)
-    increaseExternallyAllocatedBytesAliveIfNeeded(m_data.length());
-#endif
     CharacterData::trace(visitor);
 }