Add black background to ARC maximzied window

components/exo/shell_surface_unittest.cc

 // Copyright 2015 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 "components/exo/shell_surface.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
@@ skipping 836 matching lines @@
             shell_surface->GetWidget()->GetWindowBoundsInScreen().ToString());
 
   // Leave fullscreen mode.
   window->GetWindowState()->OnWMEvent(&event);
 
   // Check that shell surface is maximized.
   EXPECT_EQ(CurrentContext()->bounds().width(),
             shell_surface->GetWidget()->GetWindowBoundsInScreen().width());
 }
 
-TEST_F(ShellSurfaceTest, ImmersiveFullscreenBackground) {
+TEST_F(ShellSurfaceTest, MaximizedAndImmersiveFullscreenBackground) {
   const gfx::Size display_size =
       display::Screen::GetScreen()->GetPrimaryDisplay().size();
   const gfx::Size buffer_size(display_size);
   std::unique_ptr<Buffer> buffer(
       new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
   std::unique_ptr<Surface> surface(new Surface);
   std::unique_ptr<ShellSurface> shell_surface(new ShellSurface(
       surface.get(), nullptr, ShellSurface::BoundsMode::CLIENT, gfx::Point(),
       true, false, ash::kShellWindowId_DefaultContainer));
 
   surface->Attach(buffer.get());
 
   gfx::Rect shadow_bounds(10, 10, 100, 100);
   shell_surface->SetGeometry(shadow_bounds);
   shell_surface->SetRectangularSurfaceShadow(shadow_bounds);
   surface->Commit();
   EXPECT_EQ(shadow_bounds,
             shell_surface->GetWidget()->GetWindowBoundsInScreen());
   ASSERT_EQ(shadow_bounds, shell_surface->shadow_underlay()->bounds());
   EXPECT_EQ(display::Screen::GetScreen()->GetPrimaryDisplay().size(),
             shell_surface->surface_for_testing()->window()->bounds().size());
 
-  ash::wm::WMEvent event(ash::wm::WM_EVENT_TOGGLE_FULLSCREEN);
+  ash::wm::WMEvent fullscreen_event(ash::wm::WM_EVENT_TOGGLE_FULLSCREEN);
   ash::WmWindow* window =
       ash::WmWindow::Get(shell_surface->GetWidget()->GetNativeWindow());
 
   // Enter immersive fullscreen mode. Shadow underlay is fullscreen.
-  window->GetWindowState()->OnWMEvent(&event);
+  window->GetWindowState()->OnWMEvent(&fullscreen_event);
 
   EXPECT_TRUE(shell_surface->shadow_underlay()->IsVisible());
   EXPECT_EQ(1.f, shell_surface->shadow_underlay()->layer()->opacity());
   EXPECT_EQ(display::Screen::GetScreen()->GetPrimaryDisplay().size(),
             shell_surface->shadow_underlay()->bounds().size());
 
   // Leave fullscreen mode. Shadow underlay is restored.
-  window->GetWindowState()->OnWMEvent(&event);
+  window->GetWindowState()->OnWMEvent(&fullscreen_event);
   EXPECT_TRUE(shell_surface->shadow_underlay()->IsVisible());
   EXPECT_EQ(shadow_bounds, shell_surface->shadow_underlay()->bounds());
+
+  ash::wm::WMEvent maximize_event(ash::wm::WM_EVENT_TOGGLE_MAXIMIZE);
+
+  // Enter maximized mode. Shadow underlay is fullscreen.
+  window->GetWindowState()->OnWMEvent(&maximize_event);
+  EXPECT_TRUE(shell_surface->shadow_underlay()->IsVisible());
+  EXPECT_EQ(1.f, shell_surface->shadow_underlay()->layer()->opacity());
+  EXPECT_EQ(display::Screen::GetScreen()->GetPrimaryDisplay().size(),
+            shell_surface->shadow_underlay()->bounds().size());
+
+  // Leave maximized mode. Shadow underlay is fullscreen.
+  window->GetWindowState()->OnWMEvent(&maximize_event);
+  EXPECT_TRUE(shell_surface->shadow_underlay()->IsVisible());
+  EXPECT_EQ(1.f, shell_surface->shadow_underlay()->layer()->opacity());
+  EXPECT_EQ(shadow_bounds, shell_surface->shadow_underlay()->bounds());
 }
 
 TEST_F(ShellSurfaceTest, SpokenFeedbackFullscreenBackground) {
   const gfx::Size display_size =
       display::Screen::GetScreen()->GetPrimaryDisplay().size();
   const gfx::Size buffer_size(display_size);
   Buffer buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size));
   Surface surface;
   ShellSurface shell_surface(&surface, nullptr,
                              ShellSurface::BoundsMode::CLIENT, gfx::Point(),
@@ skipping 66 matching lines @@
   shell_surface.OnAccessibilityModeChanged();
   shell_surface2.OnAccessibilityModeChanged();
 
   EXPECT_TRUE(shell_surface.shadow_underlay()->IsVisible());
   EXPECT_EQ(shadow_bounds, shell_surface.shadow_underlay()->bounds());
   EXPECT_EQ(shadow_bounds, shell_surface2.shadow_underlay()->bounds());
 }
 
 }  // namespace
 }  // namespace exo