Deprecate GrowableArray, use ArenaVector instead.

Purge GrowableArray from Quick and Portable.
Remove GrowableArray<T>::Iterator.

Change-Id: I92157d3a6ea5975f295662809585b2dc15caa1c6
diff --git a/compiler/dex/post_opt_passes.cc b/compiler/dex/post_opt_passes.cc
index b3d5c8a..675dbcf 100644
--- a/compiler/dex/post_opt_passes.cc
+++ b/compiler/dex/post_opt_passes.cc
@@ -84,7 +84,7 @@
   // First clear all predecessors.
   AllNodesIterator first(mir_graph);
   for (BasicBlock* bb = first.Next(); bb != nullptr; bb = first.Next()) {
-    bb->predecessors->Reset();
+    bb->predecessors.clear();
   }
 
   // Now calculate all predecessors.
@@ -100,7 +100,7 @@
 
     // Now iterate through the children to set the predecessor bits.
     for (BasicBlock* child = child_iter.Next(); child != nullptr; child = child_iter.Next()) {
-      child->predecessors->Insert(bb->id);
+      child->predecessors.push_back(bb->id);
     }
   }
 }