Replace our homegrown ARRAY_SIZE() with Chrome's arraysize().

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index 940d53bb150be908a28176602151810e8d83dd44..f5560a93aea097afcbd866edcf46e58571efb1f6 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -1007,7 +1007,7 @@ void GlobalHandles::ComputeObjectGroupsAndImplicitReferences() {
 
 
 EternalHandles::EternalHandles() : size_(0) {
-  for (unsigned i = 0; i < ARRAY_SIZE(singleton_handles_); i++) {
+  for (unsigned i = 0; i < arraysize(singleton_handles_); i++) {
     singleton_handles_[i] = kInvalidIndex;
   }
 }