Updating DCHECK() to DCHECK_GE() in base/ dir

base/mach_ipc_mac.mm

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "base/mach_ipc_mac.h"
 
 #import <Foundation/Foundation.h>
 
 #include <stdio.h>
 #include "base/logging.h"
 
 namespace base {
 
+// static
+const size_t MachSendMessage::kEmptyMessageSize = sizeof(mach_msg_header_t) +
+    sizeof(mach_msg_body_t) + sizeof(MessageDataPacket);
+
 //==============================================================================
 MachSendMessage::MachSendMessage(int32_t message_id) : MachMessage() {
   Initialize(message_id);
 }
 
 MachSendMessage::MachSendMessage(void *storage, size_t storage_length,
                                  int32_t message_id)
     : MachMessage(storage, storage_length) {
   Initialize(message_id);
 }
@@ skipping 19 matching lines @@
       own_storage_(true) {
   memset(storage_, 0, storage_length_bytes_);
 }
 
 //==============================================================================
 MachMessage::MachMessage(void *storage, size_t storage_length)
     : storage_(static_cast<MachMessageData*>(storage)),
       storage_length_bytes_(storage_length),
       own_storage_(false) {
   DCHECK(storage);
-  DCHECK(storage_length >= kEmptyMessageSize);
+  DCHECK_GE(storage_length, kEmptyMessageSize);
 }
 
 //==============================================================================
 MachMessage::~MachMessage() {
   if (own_storage_) {
     delete storage_;
     storage_ = NULL;
   }
 }
 
@@ skipping 248 matching lines @@
                                   message.Head()->msgh_size,
                                   0,
                                   MACH_PORT_NULL,
                                   timeout,              // timeout in ms
                                   MACH_PORT_NULL);
 
   return result;
 }
 
 }  // namespace base