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

chrome/browser/app_controller_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 "chrome/browser/app_controller_mac.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/mac/mac_util.h"
@@ skipping 1100 matching lines @@
   else
     NOTREACHED() << "Nothing to open!";
 
   [sender replyToOpenOrPrint:NSApplicationDelegateReplySuccess];
 }
 
 // Called when the preferences window is closed. We use this to release the
 // window controller.
 - (void)prefsWindowClosed:(NSNotification*)notification {
   NSWindow* window = [prefsController_ window];
-  DCHECK([notification object] == window);
+  DCHECK_EQ([notification object], window);
   NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
   [defaultCenter removeObserver:self
                            name:NSWindowWillCloseNotification
                          object:window];
   // PreferencesWindowControllers are autoreleased in
   // -[PreferencesWindowController windowWillClose:].
   prefsController_ = nil;
 }
 
 // Show the preferences window, or bring it to the front if it's already
@@ skipping 32 matching lines @@
                name:NSWindowWillCloseNotification
              object:[prefsController_ window]];
   }
   [prefsController_ showPreferences:sender];
 }
 
 // Called when the about window is closed. We use this to release the
 // window controller.
 - (void)aboutWindowClosed:(NSNotification*)notification {
   NSWindow* window = [aboutController_ window];
-  DCHECK(window == [notification object]);
+  DCHECK_EQ(window, [notification object]);
   [[NSNotificationCenter defaultCenter]
       removeObserver:self
                 name:NSWindowWillCloseNotification
               object:window];
   // AboutWindowControllers are autoreleased in
   // -[AboutWindowController windowWillClose:].
   aboutController_ = nil;
 }
 
 - (IBAction)orderFrontStandardAboutPanel:(id)sender {
@@ skipping 47 matching lines @@
   if (profile) {
     BackgroundApplicationListModel applications(profile);
     if (applications.size()) {
       int position = 0;
       NSString* menuStr =
           l10n_util::GetNSStringWithFixup(IDS_BACKGROUND_APPS_MAC);
       scoped_nsobject<NSMenu> appMenu([[NSMenu alloc] initWithTitle:menuStr]);
       for (ExtensionList::const_iterator cursor = applications.begin();
            cursor != applications.end();
            ++cursor, ++position) {
-        DCHECK(position == applications.GetPosition(*cursor));
+        DCHECK_EQ(position, applications.GetPosition(*cursor));
         NSString* itemStr =
             base::SysUTF16ToNSString(UTF8ToUTF16((*cursor)->name()));
         scoped_nsobject<NSMenuItem> appItem([[NSMenuItem alloc]
             initWithTitle:itemStr
                    action:@selector(commandFromDock:)
             keyEquivalent:@""]);
         [appItem setTarget:self];
         [appItem setTag:position];
         [appMenu addItem:appItem];
       }
@@ skipping 31 matching lines @@
   [appController showPreferencesWindow:nil page:page profile:profile];
 }
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac