browser: Move FindBrowserWithWebContents() into chrome namespace.

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac2.mm

 // 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/cocoa/constrained_window/constrained_window_mac2.h"
 
 #include "base/logging.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
@@ skipping 46 matching lines @@
 void ConstrainedWindowMac2::PulseConstrainedWindow() {
   [[ConstrainedWindowSheetController controllerForSheet:window_]
       pulseSheet:window_];
 }
 
 gfx::NativeWindow ConstrainedWindowMac2::GetNativeWindow() {
   return window_;
 }
 
 bool ConstrainedWindowMac2::CanShowConstrainedWindow() {
-  Browser* browser = browser::FindBrowserWithWebContents(web_contents_);
+  Browser* browser = chrome::FindBrowserWithWebContents(web_contents_);
   if (!browser)
     return true;
   return !browser->window()->IsInstantTabShowing();
 }
 
 NSWindow* ConstrainedWindowMac2::GetParentWindow() const {
   // Tab contents in a tabbed browser may not be inside a window. For this
   // reason use a browser window if possible.
-  Browser* browser = browser::FindBrowserWithWebContents(web_contents_);
+  Browser* browser = chrome::FindBrowserWithWebContents(web_contents_);
   if (browser)
     return browser->window()->GetNativeWindow();
 
   return web_contents_->GetView()->GetTopLevelNativeWindow();
 }