Bunch of match preview tweaks:

chrome/browser/tab_contents/tab_contents.cc

Index: chrome/browser/tab_contents/tab_contents.cc
diff --git a/chrome/browser/tab_contents/tab_contents.cc b/chrome/browser/tab_contents/tab_contents.cc
index b5b4d49680fda4b7509b41c884c30bf8a5537714..eb3826d625b90857b46c2537ece03072ec25ae5f 100644
--- a/chrome/browser/tab_contents/tab_contents.cc
+++ b/chrome/browser/tab_contents/tab_contents.cc
@@ -77,7 +77,6 @@
 #include "chrome/browser/sessions/session_types.h"
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "chrome/browser/tab_contents/interstitial_page.h"
-#include "chrome/browser/tab_contents/match_preview.h"
 #include "chrome/browser/tab_contents/navigation_entry.h"
 #include "chrome/browser/tab_contents/provisional_load_details.h"
 #include "chrome/browser/tab_contents/tab_contents_delegate.h"
@@ -434,9 +433,6 @@ TabContents::TabContents(Profile* profile,
   // Set-up the showing of the omnibox search infobar if applicable.
   if (OmniboxSearchHint::IsEnabled(profile))
     omnibox_search_hint_.reset(new OmniboxSearchHint(this));
-
-  if (MatchPreview::IsEnabled())
-    match_preview_.reset(new MatchPreview(this));
 }
 
 TabContents::~TabContents() {