Do GC if CodeRange fails to allocate a block.

src/spaces.h

Index: src/spaces.h
diff --git a/src/spaces.h b/src/spaces.h
index b11bc1e22d1f8ccb8698e2bde39e440ccab120b3..96a1a90427f3a5cd8cce00f629d9bd596993890c 100644
--- a/src/spaces.h
+++ b/src/spaces.h
@@ -985,8 +985,8 @@ class CodeRange {
   // Finds a block on the allocation list that contains at least the
   // requested amount of memory.  If none is found, sorts and merges
   // the existing free memory blocks, and searches again.
-  // If none can be found, terminates V8 with FatalProcessOutOfMemory.
-  void GetNextAllocationBlock(size_t requested);
+  // If none can be found, returns false.
+  bool GetNextAllocationBlock(size_t requested);
   // Compares the start addresses of two free blocks.
   static int CompareFreeBlockAddress(const FreeBlock* left,
                                      const FreeBlock* right);