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

chrome/browser/ui/browser_finder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/browser_finder.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
@@ skipping 135 matching lines @@
 
 Browser* FindBrowserWithWebContents(const WebContents* web_contents) {
   DCHECK(web_contents);
   for (TabContentsIterator it; !it.done(); ++it) {
     if (it->web_contents() == web_contents)
       return it.browser();
   }
   return NULL;
 }
 
+Browser* FindBrowserForController(
+    const content::NavigationController* controller,
+    int* index_result) {
+  for (BrowserList::const_iterator it = BrowserList::begin();
+       it != BrowserList::end(); ++it) {
+    int index = (*it)->tab_strip_model()->GetIndexOfWebContents(
+        controller->GetWebContents());
+    if (index != TabStripModel::kNoTab) {
+      if (index_result)
+        *index_result = index;
+      return *it;
+    }
+  }
+  return NULL;
+}
+
+
 Browser* FindLastActiveWithProfile(Profile* profile) {
   // We are only interested in last active browsers, so we don't fall back to
   // all browsers like FindBrowserWith* do.
   return FindBrowserMatching(
       BrowserList::begin_last_active(), BrowserList::end_last_active(), profile,
       Browser::FEATURE_NONE, kMatchAny);
 }
 
 size_t GetBrowserCount(Profile* profile) {
   return GetBrowserCountImpl(profile, kMatchAny);
 }
 
 size_t GetTabbedBrowserCount(Profile* profile) {
   return GetBrowserCountImpl(profile, kMatchTabbed);
 }
 
 }  // namespace browser