Releasing allocated chunks in Pool's destructor.

src/global-handles.cc

Index: src/global-handles.cc
diff --git a/src/global-handles.cc b/src/global-handles.cc
index 573669a4572b813c85bc613ebe176389d3da5886..f089b85e1ab75f018f2cba05662e606222c6bef1 100644
--- a/src/global-handles.cc
+++ b/src/global-handles.cc
@@ -226,6 +226,12 @@ class GlobalHandles::Pool BASE_EMBEDDED {
       limit_ = current_->nodes + kNodesPerChunk;
     }
 
+    ~Pool() {
+      if (current_ != NULL) {
+        Release();
+      }
+    }
+
     Node* Allocate() {
       if (next_ < limit_) {
         return next_++;