Enable PDF accessibility when RenderFrame's accessibility mode changes.

chrome/browser/printing/print_preview_dialog_controller_browsertest.cc

 // Copyright (c) 2012 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 "chrome/browser/printing/print_preview_dialog_controller.h"
 
 #include <memory>
 
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/browser/task_management/mock_web_contents_task_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "components/printing/common/print_messages.h"
+#include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/test/browser_test_utils.h"
 #include "ipc/ipc_message_macros.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "url/gurl.h"
 
 using content::WebContents;
@@ skipping 335 matching lines @@
   EXPECT_EQ(3U, GetTrackedTags().size());
   ASSERT_EQ(3U, task_manager.tasks().size());
   const task_management::Task* task = task_manager.tasks().back();
   EXPECT_EQ(task_management::Task::RENDERER, task->GetType());
   const base::string16 title = task->title();
   EXPECT_TRUE(base::StartsWith(title,
                                expected_prefix,
                                base::CompareCase::INSENSITIVE_ASCII));
 }
 
+IN_PROC_BROWSER_TEST_F(PrintPreviewDialogControllerBrowserTest,
+                       PrintPreviewPdfAccessibility) {
+  content::BrowserAccessibilityState::GetInstance()->EnableAccessibility();
+  ui_test_utils::NavigateToURL(browser(), GURL("data:text/html,HelloWorld"));
+  PrintPreview();
+  WebContents* preview_dialog = GetPrintPreviewDialog();
+  WaitForAccessibilityTreeToContainNodeWithName(preview_dialog, "HelloWorld");
+}
+
 }  // namespace
 
 #endif  // defined(ENABLE_TASK_MANAGER)