Add missing AllowHandleDereference to LAllocator::BuildLiveRanges.

src/lithium-allocator.cc

Index: src/lithium-allocator.cc
diff --git a/src/lithium-allocator.cc b/src/lithium-allocator.cc
index 9defc5e29cefc955a35b2df6dfbc82dcb5ba36a7..1fd921f191b82beb6f2e840a55ecaf65e7f7e08c 100644
--- a/src/lithium-allocator.cc
+++ b/src/lithium-allocator.cc
@@ -1348,6 +1348,7 @@ void LAllocator::BuildLiveRanges() {
           PrintF("Function: %s\n", CodeStub::MajorName(major_key, false));
         } else {
           ASSERT(chunk_->info()->IsOptimizing());
+          AllowHandleDereference allow_deref;
           PrintF("Function: %s\n",
                  *chunk_->info()->function()->debug_name()->ToCString());
         }