Fix crash on spell check "Ask Google for suggestions"

ui/views/widget/native_widget_aura.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 "ui/views/widget/native_widget_aura.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/activation_client.h"
@@ skipping 76 matching lines @@
   return gfx::Font(caption_font);
 #else
   return gfx::Font();
 #endif
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, internal::NativeWidgetPrivate implementation:
 
 void NativeWidgetAura::InitNativeWidget(const Widget::InitParams& params) {
+  // Aura needs to know which desktop (Ash or regular) will manage this widget.
+  // See Widget::InitParams::context for details.
+  DCHECK(params.parent || params.context);

[stevenjb, 2013/01/24 23:32:33]

nit: Since now at least two devs have been bitten by this, can you add '<<
"InitNativeWidget must provide parent or context"' so that devs can egt some
feedback without running a debugger?

+
   ownership_ = params.ownership;
 
   window_->set_user_data(this);
   window_->SetType(GetAuraWindowTypeForWidgetType(params.type));
   window_->SetProperty(aura::client::kShowStateKey, params.show_state);
   if (params.type == Widget::InitParams::TYPE_BUBBLE)
     aura::client::SetHideOnDeactivate(window_, true);
   window_->SetTransparent(params.transparent);
   window_->Init(params.layer_type);
   if (params.type == Widget::InitParams::TYPE_CONTROL)
@@ skipping 943 matching lines @@
   return aura::Env::GetInstance()->is_mouse_button_down();
 }
 
 // static
 bool NativeWidgetPrivate::IsTouchDown() {
   return aura::Env::GetInstance()->is_touch_down();
 }
 
 }  // namespace internal
 }  // namespace views