Enhancements to PartitionAlloc to support threading and arbitrary allocation sizes.

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index a41e491d56ecd8157f8a7a75799237e3a2a4de09..0f4c612176bd04b54942a2d4676e0b50f6421809 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -124,11 +124,13 @@ RenderObjectAncestorLineboxDirtySet* RenderObject::s_ancestorLineboxDirtySet = 0
 
 void* RenderObject::operator new(size_t sz)
 {
+    ASSERT(isMainThread());
     return partitionAlloc(Partitions::getRenderingPartition(), sz);
 }
 
 void RenderObject::operator delete(void* ptr)
 {
+    ASSERT(isMainThread());
     partitionFree(ptr);
 }