Add ability to have active window autohide shelf

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 189 matching lines @@
   EXPECT_TRUE(
       ash::wm::GetWindowState(shell_surface->GetWidget()->GetNativeWindow())
           ->IsPinned());
 
   shell_surface->SetPinned(false, /* trusted */ false);
   EXPECT_FALSE(
       ash::wm::GetWindowState(shell_surface->GetWidget()->GetNativeWindow())
           ->IsPinned());
 }
 
+TEST_F(ShellSurfaceTest, SetSystemUiVisibility) {
+  gfx::Size buffer_size(256, 256);
+  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()));
+  surface->Attach(buffer.get());
+  surface->Commit();
+
+  shell_surface->SetSystemUiVisibility(true);
+  EXPECT_TRUE(
+      ash::wm::GetWindowState(shell_surface->GetWidget()->GetNativeWindow())
+          ->autohide_shelf_when_maximized_or_fullscreen());
+
+  shell_surface->SetSystemUiVisibility(false);
+  EXPECT_FALSE(
+      ash::wm::GetWindowState(shell_surface->GetWidget()->GetNativeWindow())
+          ->autohide_shelf_when_maximized_or_fullscreen());
+}
+
 TEST_F(ShellSurfaceTest, SetTitle) {
   std::unique_ptr<Surface> surface(new Surface);
   std::unique_ptr<ShellSurface> shell_surface(new ShellSurface(surface.get()));
 
   shell_surface->SetTitle(base::string16(base::ASCIIToUTF16("test")));
   surface->Commit();
 }
 
 TEST_F(ShellSurfaceTest, SetApplicationId) {
   gfx::Size buffer_size(64, 64);
@@ skipping 767 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