Add missing AllowHandleDereference to LAllocator::BuildLiveRanges.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/16509004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15007 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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());
         }