Switch FindTabHelper to use WebContentsUserData.

BUG=107201
TEST=no visible change


Review URL: https://chromiumcodereview.appspot.com/10987094

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@159429 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/ui/browser_commands.cc b/chrome/browser/ui/browser_commands.cc
index e6d50cb..31f552a 100644
--- a/chrome/browser/ui/browser_commands.cc
+++ b/chrome/browser/ui/browser_commands.cc
@@ -796,10 +796,10 @@
     // We always want to search for the contents of the find pasteboard on OS X.
     find_text = GetFindPboardText();
 #endif
-    GetActiveTabContents(browser)->
-        find_tab_helper()->StartFinding(find_text,
-                                        forward_direction,
-                                        false);  // Not case sensitive.
+    FindTabHelper::FromWebContents(GetActiveWebContents(browser))->
+        StartFinding(find_text,
+                     forward_direction,
+                     false);  // Not case sensitive.
   }
 }