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

chrome/browser/ui/browser_finder.cc

Index: chrome/browser/ui/browser_finder.cc
===================================================================
--- chrome/browser/ui/browser_finder.cc	(revision 150796)
+++ chrome/browser/ui/browser_finder.cc	(working copy)
@@ -153,6 +153,23 @@
   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.