[Refactor] Move code for painting the window header for browser windows out of ash

ash/frame/default_header_painter_unittest.cc

+// Copyright 2013 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 "ash/frame/default_header_painter.h"
+
+#include "ash/frame/caption_buttons/frame_caption_button_container_view.h"
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ash/wm/window_state.h"
+#include "base/memory/scoped_ptr.h"
+#include "grit/ash_resources.h"
+#include "ui/gfx/font_list.h"
+#include "ui/views/widget/widget.h"
+#include "ui/views/window/non_client_view.h"
+
+using ash::HeaderPainter;
+using views::NonClientFrameView;
+using views::Widget;
+
+namespace ash {
+
+class DefaultHeaderPainterTest : public ash::test::AshTestBase {
+ public:
+  // Creates a test widget that owns its native widget.
+  Widget* CreateTestWidget() {
+    Widget* widget = new Widget;
+    Widget::InitParams params;
+    params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+    params.context = CurrentContext();
+    widget->Init(params);
+    return widget;
+  }
+};
+
+// Ensure the title text is vertically aligned with the window icon.
+TEST_F(DefaultHeaderPainterTest, TitleIconAlignment) {
+  scoped_ptr<Widget> w(CreateTestWidget());
+  ash::FrameCaptionButtonContainerView container(w.get(),
+  ash::FrameCaptionButtonContainerView::MINIMIZE_ALLOWED);
+  views::View window_icon;
+  window_icon.SetBounds(0, 0, 16, 16);
+  w->SetBounds(gfx::Rect(0, 0, 500, 500));
+  w->Show();
+
+  DefaultHeaderPainter painter;
+  painter.Init(w.get(),
+               w->non_client_view()->frame_view(),
+               &window_icon,
+               &container);
+  painter.LayoutHeader();
+  gfx::Rect title_bounds = painter.GetTitleBounds();
+  EXPECT_EQ(window_icon.bounds().CenterPoint().y(),
+            title_bounds.CenterPoint().y());
+}
+
+}  // namespace ash