Begun the DCHECK() cleanup. Starting off with /src/chrome/a* and /src/chrome/...

chrome/browser/autofill/autofill_dialog_controller_mac.mm

 // Copyright (c) 2010 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 "chrome/browser/autofill/autofill_dialog_controller_mac.h"
 #include "base/lazy_instance.h"
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #import "chrome/browser/autofill/autofill_address_model_mac.h"
 #import "chrome/browser/autofill/autofill_address_sheet_controller_mac.h"
@@ skipping 317 matching lines @@
      modalForWindow:[self window]
       modalDelegate:self
      didEndSelector:@selector(creditCardAddDidEnd:returnCode:contextInfo:)
         contextInfo:NULL];
 }
 
 // Add address sheet was dismissed.  Non-zero |returnCode| indicates a save.
 - (void)addressAddDidEnd:(NSWindow*)sheet
               returnCode:(int)returnCode
              contextInfo:(void*)contextInfo {
-  DCHECK(contextInfo == NULL);
+  DCHECK(!contextInfo);
 
   if (returnCode) {
     // Create a new address and save it to the |profiles_| list.
     AutoFillProfile newAddress;
     [addressSheetController copyModelToProfile:&newAddress];
     if (!newAddress.IsEmpty() && !FindByContents(profiles_, newAddress)) {
       profiles_.push_back(newAddress);
 
       // Saving will save to the PDM and the table will refresh when PDM sends
       // notification that the underlying model has changed.
       [self save];
 
       // Update the selection to the newly added item.
       NSInteger row = [self rowFromProfileIndex:profiles_.size() - 1];
       [tableView_ selectRowIndexes:[NSIndexSet indexSetWithIndex:row]
               byExtendingSelection:NO];
     }
   }
   [sheet orderOut:self];
   addressSheetController.reset(nil);
 }
 
 // Add credit card sheet was dismissed.  Non-zero |returnCode| indicates a save.
-- (void)creditCardAddDidEnd:(NSWindow *)sheet
+- (void)creditCardAddDidEnd:(NSWindow*)sheet
                  returnCode:(int)returnCode
-                contextInfo:(void *)contextInfo {
-  DCHECK(contextInfo == NULL);
+                contextInfo:(void*)contextInfo {
+  DCHECK(!contextInfo);
 
   if (returnCode) {
     // Create a new credit card and save it to the |creditCards_| list.
     CreditCard newCreditCard;
     [creditCardSheetController copyModelToCreditCard:&newCreditCard];
     if (!newCreditCard.IsEmpty() &&
         !FindByContents(creditCards_, newCreditCard)) {
       creditCards_.push_back(newCreditCard);
 
       // Saving will save to the PDM and the table will refresh when PDM sends
@@ skipping 556 matching lines @@
   if (!image) {
     image = rb.GetNativeImageNamed(IDR_INPUT_GOOD);
     DCHECK(image);
     return image;
   }
 
   return nil;
 }
 
 @end