[Mac] Simplify getting page-action info-bubble point.

chrome/browser/cocoa/browser_window_controller.mm

 // Copyright (c) 2010 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.
 
 #import "chrome/browser/cocoa/browser_window_controller.h"
 
 #include <Carbon/Carbon.h>
 
 #include "app/l10n_util_mac.h"
 #include "base/mac_util.h"
@@ skipping 328 matching lines @@
 }
 
 - (TabStripController*)tabStripController {
   return tabStripController_.get();
 }
 
 - (StatusBubbleMac*)statusBubble {
   return statusBubble_;
 }
 
-- (LocationBar*)locationBarBridge {
+- (LocationBarViewMac*)locationBarBridge {
   return [toolbarController_ locationBarBridge];
 }
 
 - (void)destroyBrowser {
   [NSApp removeWindowsItem:[self window]];
 
   // We need the window to go away now.
   // We can't actually use |-autorelease| here because there's an embedded
   // run loop in the |-performClose:| which contains its own autorelease pool.
   // Instead call it after a zero-length delay, which gets us back to the main
@@ skipping 1270 matching lines @@
 }
 
 - (BOOL)useVerticalTabs {
   return browser_->tabstrip_model()->delegate()->UseVerticalTabs();
 }
 
 - (void)setToolbarCollapsedMode:(BOOL)collapsed {
   if (toolbarCollapsed_ == collapsed)
     return;
 
-  static_cast<LocationBarViewMac*>([self locationBarBridge])->
-      SetEditable(!collapsed);
+  [self locationBarBridge]->SetEditable(!collapsed);
 
   // TODO(andybons): Actually hide toolbar if collapsed.
 
   toolbarCollapsed_ = collapsed;
 }
 
 - (void)sheetDidEnd:(NSWindow*)sheet
          returnCode:(NSInteger)code
             context:(void*)context {
   [sheet orderOut:self];
@@ skipping 220 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isNormalWindow {
   return browser_->type() == Browser::TYPE_NORMAL;
 }
 
 @end  // @implementation BrowserWindowController(WindowType)