Coverity: Initialize member variables.

content/renderer/renderer_accessibility.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_RENDERER_RENDERER_ACCESSIBILITY_H_
 #define CONTENT_RENDERER_RENDERER_ACCESSIBILITY_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 44 matching lines @@
     int32 id;
 
     // The accessibility notification type.
     WebKit::WebAccessibilityNotification type;
   };
 
   // In order to keep track of what nodes the browser knows about, we keep a
   // representation of the browser tree - just IDs and parent/child
   // relationships.
   struct BrowserTreeNode {
-    BrowserTreeNode() {}
+    BrowserTreeNode() : id(0) {}
     ~BrowserTreeNode() {}
     int32 id;
     std::vector<BrowserTreeNode*> children;
   };
 
   // Send queued notifications from the renderer to the browser.
   void SendPendingAccessibilityNotifications();
 
   // Update our representation of what nodes the browser has, given a
   // tree of nodes.
@@ skipping 41 matching lines @@
   // Set if we are waiting for an accessibility notification ack.
   bool ack_pending_;
 
   // True if verbose logging of accessibility events is on.
   bool logging_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererAccessibility);
 };
 
 #endif  // CONTENT_RENDERER_RENDERER_ACCESSIBILITY_H_