Clean up round and align in PartitionAlloc

Source/wtf/PartitionAlloc.h

Index: Source/wtf/PartitionAlloc.h
diff --git a/Source/wtf/PartitionAlloc.h b/Source/wtf/PartitionAlloc.h
index 1db9ab68245ce91cc9bd38dcd2886a8fc35b3603..d0c22ac9e3995a57704b00c46970a4cca9de7375 100644
--- a/Source/wtf/PartitionAlloc.h
+++ b/Source/wtf/PartitionAlloc.h
@@ -726,7 +726,7 @@ ALWAYS_INLINE void partitionFreeGeneric(PartitionRootGeneric* root, void* ptr)
 #endif
 }
 
-ALWAYS_INLINE size_t partitionDirectMapSize(size_t size)

[Primiano Tucci (use gerrit), 2015/09/03 11:24:53]

I think this should stay as it is (as the assert is map-specific)

[Ruud van Asseldonk, 2015/09/03 13:44:47]

Done.

+ALWAYS_INLINE size_t partitionRoundUpToSystemPage(size_t size)
 {
     // Caller must check that the size is not above the kGenericMaxDirectMapped
     // limit before calling. This also guards against integer overflow in the
@@ -749,7 +749,7 @@ ALWAYS_INLINE size_t partitionAllocActualSize(PartitionRootGeneric* root, size_t
         // Too large to allocate => return the size unchanged.
     } else {
         ASSERT(bucket == &PartitionRootBase::gPagedBucket);
-        size = partitionDirectMapSize(size);

[Primiano Tucci (use gerrit), 2015/09/03 11:24:53]

ditto

+        size = partitionRoundUpToSystemPage(size);
     }
     return partitionCookieSizeAdjustSubtract(size);
 #endif