Objects that derive from RefCounted/RefCountedThreadSafe should not have public dtors.

base/message_pump_mac.mm

 // 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.
 
 #import "base/message_pump_mac.h"
 
 #import <AppKit/AppKit.h>
 #import <Foundation/Foundation.h>
 
 #include <limits>
@@ skipping 442 matching lines @@
 
 // Base version returns a standard NSAutoreleasePool.
 NSAutoreleasePool* MessagePumpCFRunLoopBase::CreateAutoreleasePool() {
   return [[NSAutoreleasePool alloc] init];
 }
 
 MessagePumpCFRunLoop::MessagePumpCFRunLoop()
     : quit_pending_(false) {
 }
 
+MessagePumpCFRunLoop::~MessagePumpCFRunLoop() {}
+
 // Called by MessagePumpCFRunLoopBase::DoRun.  If other CFRunLoopRun loops were
 // running lower on the run loop thread's stack when this object was created,
 // the same number of CFRunLoopRun loops must be running for the outermost call
 // to Run.  Run/DoRun are reentrant after that point.
 void MessagePumpCFRunLoop::DoRun(Delegate* delegate) {
   // This is completely identical to calling CFRunLoopRun(), except autorelease
   // pool management is introduced.
   int result;
   do {
     MessagePumpScopedAutoreleasePool autorelease_pool(this);
@@ skipping 62 matching lines @@
   keep_running_ = false;
   CFRunLoopSourceSignal(quit_source_);
   CFRunLoopWakeUp(run_loop());
 }
 
 MessagePumpNSApplication::MessagePumpNSApplication()
     : keep_running_(true),
       running_own_loop_(false) {
 }
 
+MessagePumpNSApplication::~MessagePumpNSApplication() {}
+
 void MessagePumpNSApplication::DoRun(Delegate* delegate) {
   bool last_running_own_loop_ = running_own_loop_;
 
   // NSApp must be initialized by calling:
   // [{some class which implements CrAppProtocol} sharedApplication]
   // Most likely candidates are CrApplication or BrowserCrApplication.
   // These can be initialized from C++ code by calling
   // RegisterCrApp() or RegisterBrowserCrApp().
   CHECK(NSApp);
 
@@ skipping 114 matching lines @@
 }
 
 // static
 bool MessagePumpMac::IsHandlingSendEvent() {
   DCHECK([NSApp conformsToProtocol:@protocol(CrAppProtocol)]);
   NSObject<CrAppProtocol>* app = static_cast<NSObject<CrAppProtocol>*>(NSApp);
   return [app isHandlingSendEvent];
 }
 
 }  // namespace base