A better fix for crash when opening Incognito window.

chrome/browser/ui/cocoa/browser_window_controller.mm

 // Copyright 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 
 #include "base/command_line.h"
@@ skipping 609 matching lines @@
   [self saveWindowPositionIfNeeded];
 
   // TODO(dmaclach): Instead of redrawing the whole window, views that care
   // about the active window state should be registering for notifications.
   [[self window] setViewsNeedDisplay:YES];
 
   // TODO(viettrungluu): For some reason, the above doesn't suffice.
   if ([self isInAnyFullscreenMode])
     [floatingBarBackingView_ setNeedsDisplay:YES];  // Okay even if nil.
 
-  auto registry =
-      extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile());
-  if (registry) {
-    registry->set_registry_for_active_window(
-        extension_keybinding_registry_.get());
-  }
+  extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile())
+      ->set_registry_for_active_window(extension_keybinding_registry_.get());
 }
 
 - (void)windowDidResignMain:(NSNotification*)notification {
   // TODO(dmaclach): Instead of redrawing the whole window, views that care
   // about the active window state should be registering for notifications.
   [[self window] setViewsNeedDisplay:YES];
 
   // TODO(viettrungluu): For some reason, the above doesn't suffice.
   if ([self isInAnyFullscreenMode])
     [floatingBarBackingView_ setNeedsDisplay:YES];  // Okay even if nil.
 
-  auto registry =
-      extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile());
-  if (registry)
-    registry->set_registry_for_active_window(nullptr);
+  extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile())
+      ->set_registry_for_active_window(nullptr);
 }
 
 // Called when we are activated (when we gain focus).
 - (void)windowDidBecomeKey:(NSNotification*)notification {
   // We need to activate the controls (in the "WebView"). To do this, get the
   // selected WebContents's RenderWidgetHostView and tell it to activate.
   if (WebContents* contents =
           browser_->tab_strip_model()->GetActiveWebContents()) {
 
     WebContents* devtools = DevToolsWindow::GetInTabWebContents(
@@ skipping 1577 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isTabbedWindow {
   return browser_->is_type_tabbed();
 }
 
 @end  // @implementation BrowserWindowController(WindowType)