Add code and key into the browser test key simulation methods.

chrome/browser/apps/guest_view/web_view_browsertest.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 <queue>
 #include <set>
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/files/file_util.h"
@@ skipping 3091 matching lines @@
   // Wait for focus to land on the "root web area" role, representing
   // focus on the main document itself.
   while (content::GetFocusedAccessibilityNodeInfo(web_contents).role !=
              ui::AX_ROLE_ROOT_WEB_AREA) {
     content::WaitForAccessibilityFocusChange();
   }
 
   // Now keep pressing the Tab key until focus lands on a button.
   while (content::GetFocusedAccessibilityNodeInfo(web_contents).role !=
              ui::AX_ROLE_BUTTON) {
-    content::SimulateKeyPress(
-        web_contents, ui::VKEY_TAB, false, false, false, false);
+    content::SimulateKeyPress(web_contents, ui::DomKey::FromCharacter('\t'),
+                              ui::DomCode::TAB, ui::VKEY_TAB, false, false,
+                              false, false);
     content::WaitForAccessibilityFocusChange();
   }
 
   // Ensure that we hit the button inside the guest frame labeled
   // "Guest button".
   ui::AXNodeData node_data =
       content::GetFocusedAccessibilityNodeInfo(web_contents);
   EXPECT_EQ("Guest button", node_data.GetStringAttribute(ui::AX_ATTR_NAME));
 }
 
@@ skipping 460 matching lines @@
   gfx::Point embedder_origin =
       GetEmbedderWebContents()->GetContainerBounds().origin();
   guest_rect.Offset(-embedder_origin.x(), -embedder_origin.y());
 
   // Generate and send synthetic touch event.
   content::SimulateTouchPressAt(GetEmbedderWebContents(),
                                 guest_rect.CenterPoint());
   EXPECT_TRUE(aura_webview->HasFocus());
 }
 #endif