GTTF: Enable glibcxx debug mode for Debug builds by default.

chrome/browser/chromeos/drive/search_metadata.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/drive/search_metadata.h"
 
 #include <algorithm>
 #include <queue>
 
 #include "base/bind.h"
@@ skipping 60 matching lines @@
 
   bool empty() const { return queue_.empty(); }
 
   size_t size() const { return queue_.size(); }
 
   const T* top() const { return queue_.top(); }
 
   void push(T* x) { queue_.push(x); }
 
   void pop() {
-    delete queue_.top();
+    // Keep top alive for the pop() call so that debug checks can access
+    // underlying data (e.g. validating heap property of the priority queue
+    // will call the comparator).
+    T* saved_top = queue_.top();
     queue_.pop();
+    delete saved_top;
   }
 
  private:
   std::priority_queue<T*, std::vector<T*>, Compare> queue_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedPriorityQueue);
 };
 
 // Returns true if |entry| is eligible for the search |options| and should be
 // tested for the match with the query.  If
@@ skipping 178 matching lines @@
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(pre)));
   highlighted_text->append("<b>");
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(match)));
   highlighted_text->append("</b>");
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(post)));
   return true;
 }
 
 }  // namespace internal
 }  // namespace drive