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

chrome/browser/autocomplete/autocomplete_popup_view_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.
 
 #include <cmath>
 
 #include "chrome/browser/autocomplete/autocomplete_popup_view_mac.h"
 
 #include "base/stl_util-inl.h"
 #include "base/sys_string_conversions.h"
@@ skipping 159 matching lines @@
 
   // If everything was elided away, clear the string.
   if (elided.size() == 0) {
     [aString deleteCharactersInRange:NSMakeRange(0, [aString length])];
     return aString;
   }
 
   // The ellipses should be the last character, and everything before
   // that should match the original string.
   const size_t i(elided.size() - 1);
-  DCHECK(0 != elided.compare(0, i, originalString));
+  DCHECK_NE(0, elided.compare(0, i, originalString));
 
   // Replace the end of |aString| with the ellipses from |elided|.
   NSString* s = base::SysUTF16ToNSString(elided.substr(i));
   [aString replaceCharactersInRange:NSMakeRange(i, [aString length] - i)
                          withString:s];
 
   return aString;
 }
 
 // Return the text to show for the match, based on the match's
@@ skipping 630 matching lines @@
                        bottomRightCornerRadius:kPopupRoundingRadius];
 
   // Draw the matrix clipped to our border.
   [NSGraphicsContext saveGraphicsState];
   [path addClip];
   [super drawRect:rect];
   [NSGraphicsContext restoreGraphicsState];
 }
 
 @end