Optimizing: Tag arena allocations in HGraph.

Replace GrowableArray with ArenaVector in HGraph and related
classes HEnvironment, HLoopInformation, HInvoke and HPhi,
and tag allocations with new arena allocation types.

Change-Id: I3d79897af405b9a1a5b98bfc372e70fe0b3bc40d
diff --git a/compiler/optimizing/optimizing_cfi_test.cc b/compiler/optimizing/optimizing_cfi_test.cc
index f455571..05c6b2c 100644
--- a/compiler/optimizing/optimizing_cfi_test.cc
+++ b/compiler/optimizing/optimizing_cfi_test.cc
@@ -71,7 +71,7 @@
         }
       }
     }
-    GrowableArray<HBasicBlock*> blocks(&allocator, 0);
+    ArenaVector<HBasicBlock*> blocks(allocator.Adapter());
     code_gen->block_order_ = &blocks;
     code_gen->ComputeSpillMask();
     code_gen->SetFrameSize(frame_size);