Bunch of match preview tweaks:

chrome/browser/tab_contents/tab_contents.h

Index: chrome/browser/tab_contents/tab_contents.h
diff --git a/chrome/browser/tab_contents/tab_contents.h b/chrome/browser/tab_contents/tab_contents.h
index 39596f3771f39fcebad8f973adc65f452b73e8d7..63759b45e52ede2016561d193d769ad54283656c 100644
--- a/chrome/browser/tab_contents/tab_contents.h
+++ b/chrome/browser/tab_contents/tab_contents.h
@@ -72,7 +72,6 @@ class Extension;
 class FileSelectHelper;
 class InfoBarDelegate;
 class LoadNotificationDetails;
-class MatchPreview;
 class OmniboxSearchHint;
 class PasswordManager;
 class PluginInstaller;
@@ -168,9 +167,6 @@ class TabContents : public PageNavigator,
   // Returns the TabContentsSSLHelper, creating it if necessary.
   TabContentsSSLHelper* GetSSLHelper();
 
-  // Returns the MatchPreview. Returns NULL if MatchPreview is not enabled.
-  MatchPreview* match_preview() { return match_preview_.get(); }
-
   // Returns the SavePackage which manages the page saving job. May be NULL.
   SavePackage* save_package() const { return save_package_.get(); }
 
@@ -1277,8 +1273,6 @@ class TabContents : public PageNavigator,
   // See description in RenderViewHostDelegate::SetDisplayingPDFContent.
   bool displaying_pdf_content_;
 
-  scoped_ptr<MatchPreview> match_preview_;
-
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);