Speculative revert to see if this change introduced a performance regression on Mac intl perf bots.

chrome/browser/ui/browser_finder.h

Index: chrome/browser/ui/browser_finder.h
===================================================================
--- chrome/browser/ui/browser_finder.h	(revision 150796)
+++ chrome/browser/ui/browser_finder.h	(working copy)
@@ -52,6 +52,14 @@
 // |web_contents| must not be NULL.
 Browser* FindBrowserWithWebContents(const content::WebContents* web_contents);
 
+// Returns the Browser which contains the tab with the given
+// NavigationController, also filling in |index| (if valid) with the tab's index
+// in the tab strip.  Returns NULL if not found.  This call is O(N) in the
+// number of tabs.
+Browser* FindBrowserForController(
+    const content::NavigationController* controller,
+    int* index);
+
 // Identical in behavior to BrowserList::GetLastActive(), except that the most
 // recently open browser owned by |profile| is returned. If none exist, returns
 // NULL.  WARNING: see warnings in BrowserList::GetLastActive().