ash: Disable window caption buttons in immersive mode

chrome/browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc

Index: chrome/browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc
diff --git a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc
index 4d3b3d93326594a091a914a22869ade160320901..da5b29f100a943ad79bfd172ea58234e3e66e921 100644
--- a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc
+++ b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc
@@ -7,8 +7,10 @@
 #include "ash/ash_constants.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
+#include "chrome/browser/ui/views/immersive_mode_controller.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "ui/base/hit_test.h"
+#include "ui/views/controls/button/image_button.h"
 #include "ui/views/widget/widget.h"
 
 using views::Widget;
@@ -17,7 +19,8 @@ typedef InProcessBrowserTest BrowserNonClientFrameViewAshTest;
 
 IN_PROC_BROWSER_TEST_F(BrowserNonClientFrameViewAshTest, WindowHeader) {
   // We know we're using Views, so static cast.
-  Widget* widget = static_cast<BrowserView*>(browser()->window())->GetWidget();
+  BrowserView* browser_view = static_cast<BrowserView*>(browser()->window());
+  Widget* widget = browser_view->GetWidget();
   // We know we're using Ash, so static cast.
   BrowserNonClientFrameViewAsh* frame_view =
       static_cast<BrowserNonClientFrameViewAsh*>(
@@ -69,3 +72,44 @@ IN_PROC_BROWSER_TEST_F(BrowserNonClientFrameViewAshTest, WindowHeader) {
   app_widget->SetBounds(gfx::Rect(15, 15, 250, 250));
   EXPECT_FALSE(app_frame_view->UseShortHeader());
 }
+
+IN_PROC_BROWSER_TEST_F(BrowserNonClientFrameViewAshTest, ImmersiveMode) {
+  // We know we're using Views, so static cast.
+  BrowserView* browser_view = static_cast<BrowserView*>(browser()->window());
+  Widget* widget = browser_view->GetWidget();
+  // We know we're using Ash, so static cast.
+  BrowserNonClientFrameViewAsh* frame_view =
+      static_cast<BrowserNonClientFrameViewAsh*>(
+          widget->non_client_view()->frame_view());
+
+  // Normal window does not have immersive mode button.
+  EXPECT_FALSE(frame_view->immersive_button_->visible());
+
+  // Maximized window shows immersive mode button.
+  widget->Maximize();
+  EXPECT_TRUE(frame_view->immersive_button_->visible());
+
+  // Entering immersive mode hides the caption buttons.
+  browser_view->immersive_mode_controller()->SetEnabled(true);
+  EXPECT_FALSE(frame_view->immersive_button_->visible());
+  EXPECT_FALSE(frame_view->size_button_->visible());
+  EXPECT_FALSE(frame_view->close_button_->visible());
+
+  // An immersive reveal shows the buttons.
+  browser_view->immersive_mode_controller()->StartRevealForTest();
+  EXPECT_TRUE(frame_view->immersive_button_->visible());
+  EXPECT_TRUE(frame_view->size_button_->visible());
+  EXPECT_TRUE(frame_view->close_button_->visible());
+
+  // Ending reveal hides them again.
+  browser_view->immersive_mode_controller()->CancelReveal();
+  EXPECT_FALSE(frame_view->immersive_button_->visible());
+  EXPECT_FALSE(frame_view->size_button_->visible());
+  EXPECT_FALSE(frame_view->close_button_->visible());
+
+  // Exiting immersive mode makes them visible again.
+  browser_view->immersive_mode_controller()->SetEnabled(false);
+  EXPECT_TRUE(frame_view->immersive_button_->visible());
+  EXPECT_TRUE(frame_view->size_button_->visible());
+  EXPECT_TRUE(frame_view->close_button_->visible());
+}