Handle empty allocation list in CodeRange properly.

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index ff55c89e5d2f34036d79a8d57e704bf9c2dd9302..f91181e03661a927c53b0e7f9cf99f431fa9461b 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -186,8 +186,10 @@ Address CodeRange::AllocateRawMemory(const size_t requested_size,
                                      const size_t commit_size,
                                      size_t* allocated) {
   DCHECK(commit_size <= requested_size);
-  DCHECK(current_allocation_block_index_ < allocation_list_.length());
-  if (requested_size > allocation_list_[current_allocation_block_index_].size) {
+  DCHECK(allocation_list_.length() == 0 ||
+         current_allocation_block_index_ < allocation_list_.length());
+  if (allocation_list_.length() == 0 ||
+      requested_size > allocation_list_[current_allocation_block_index_].size) {
     // Find an allocation block large enough.
     if (!GetNextAllocationBlock(requested_size)) return NULL;
   }
@@ -211,7 +213,7 @@ Address CodeRange::AllocateRawMemory(const size_t requested_size,
   allocation_list_[current_allocation_block_index_].size -= *allocated;
   if (*allocated == current.size) {
     // This block is used up, get the next one.
-    if (!GetNextAllocationBlock(0)) return NULL;
+    GetNextAllocationBlock(0);
   }
   return current.start;
 }