cros: Remove ShellTestApi::ShowContextMenu.

Addressing missed feedback from crrev.com/c/2581027, use right
click instead of adding new API.

Bug: none
Test: compiles
Change-Id: I988c92c87e9339702a5554bd7e5375d467616412
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2623424Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842603}

ash/public/cpp/test/shell_test_api.h

@@ -116,10 +116,6 @@ class ASH_EXPORT ShellTestApi {
   // It returns nullptr when app-list is not shown.
   PaginationModel* GetAppListPaginationModel();
 
-  // Shows the context menu associated with the primary root window at point (1,
-  // 1).
-  void ShowContextMenu();
-
   // Returns true if the context menu associated with the primary root window is
   // shown.
   bool IsContextMenuShown() const;

ash/shell_test_api.cc

@@ -252,11 +252,6 @@ PaginationModel* ShellTestApi::GetAppListPaginationModel() {
   return view->GetAppsPaginationModel();
 }
 
-void ShellTestApi::ShowContextMenu() {
-  Shell::GetPrimaryRootWindowController()->ShowContextMenu(
-      gfx::Point(1, 1), ui::MENU_SOURCE_MOUSE);
-}
-
 bool ShellTestApi::IsContextMenuShown() const {
   return Shell::GetPrimaryRootWindowController()->IsContextMenuShown();
 }

chrome/browser/ui/ash/capture_mode_browsertest.cc

@@ -6,9 +6,15 @@
 #include "ash/public/cpp/capture_mode_test_api.h"
 #include "ash/public/cpp/test/shell_test_api.h"
 #include "base/test/scoped_feature_list.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/test/browser_test.h"
+#include "ui/aura/window.h"
+#include "ui/events/test/event_generator.h"
 
+// Testing class to test CrOS capture mode, which is a feature to take
+// screenshots and record video.
 class CaptureModeBrowserTest : public InProcessBrowserTest {
  public:
   CaptureModeBrowserTest() = default;
@@ -27,8 +33,16 @@ class CaptureModeBrowserTest : public InProcessBrowserTest {
 };
 
 IN_PROC_BROWSER_TEST_F(CaptureModeBrowserTest, ContextMenuStaysOpen) {
+  // Right click the desktop to open a context menu.
+  aura::Window* browser_window = browser()->window()->GetNativeWindow();
+  const gfx::Point point_on_desktop(1, 1);
+  ASSERT_FALSE(browser_window->bounds().Contains(point_on_desktop));
+
+  ui::test::EventGenerator event_generator(browser_window->GetRootWindow(),
+                                           point_on_desktop);
+  event_generator.ClickRightButton();
+
   ash::ShellTestApi shell_test_api;
-  shell_test_api.ShowContextMenu();
   ASSERT_TRUE(shell_test_api.IsContextMenuShown());
 
   ash::CaptureModeTestApi().StartForWindow(/*for_video=*/false);