Replace --top-sites flag with --no-top-sites flag. TopSites becomes the default.

BUG=none
TEST=manual

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=55244

Review URL: http://codereview.chromium.org/3054028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@55610 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/tab_contents/tab_contents.cc b/chrome/browser/tab_contents/tab_contents.cc
index 96c2411f..3e43c8f 100644
--- a/chrome/browser/tab_contents/tab_contents.cc
+++ b/chrome/browser/tab_contents/tab_contents.cc
@@ -2485,7 +2485,7 @@
                                   const SkBitmap& bitmap,
                                   const ThumbnailScore& score) {
   // Tell History about this thumbnail
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTopSites)) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoTopSites)) {
     if (!profile()->IsOffTheRecord())
       profile()->GetTopSites()->SetPageThumbnail(url, bitmap, score);
   } else {