Adds support for showing the match preview on views. It's behind the

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 ab4cf567f656aeea28ddaa931cd3d988434e77f9..ac73e962b7bc87508c81456e7dc26a4425420572 100644
--- a/chrome/browser/tab_contents/tab_contents.h
+++ b/chrome/browser/tab_contents/tab_contents.h
@@ -68,6 +68,7 @@ class DownloadItem;
 class Extension;
 class InfoBarDelegate;
 class LoadNotificationDetails;
+class MatchPreview;
 class OmniboxSearchHint;
 class PasswordManager;
 class PluginInstaller;
@@ -160,6 +161,9 @@ class TabContents : public PageNavigator,
   // Returns the TabContentsSSLHelper, creating if it 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(); }
 
@@ -1261,6 +1265,8 @@ class TabContents : public PageNavigator,
   // See description in RenderViewHostDelegate::SetDisplayingPDFContent.
   bool displaying_pdf_content_;
 
+  scoped_ptr<MatchPreview> match_preview_;
+
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);