Revert 49339 - Enable renderer accessibility by default....

chrome/browser/tab_contents/tab_contents.cc

 // Copyright (c) 2010 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/tab_contents/tab_contents.h"
 
 #if defined(OS_CHROMEOS)
 // For GdkScreen
 #include <gdk/gdk.h>
 #endif  // defined(OS_CHROMEOS)
@@ skipping 278 matching lines @@
 #if defined(OS_WIN)
       message_box_active_(CreateEvent(NULL, TRUE, FALSE, NULL)),
 #endif
       last_javascript_message_dismissal_(),
       suppress_javascript_messages_(false),
       is_showing_before_unload_dialog_(false),
       renderer_preferences_(),
       opener_dom_ui_type_(DOMUIFactory::kNoDOMUI),
       language_state_(&controller_),
       geolocation_settings_state_(profile),
+      requested_accessibility_tree_(false),
       closed_by_user_gesture_(false) {
   ClearBlockedContentSettings();
   renderer_preferences_util::UpdateFromSystemSettings(
       &renderer_preferences_, profile);
 
 #if defined(OS_CHROMEOS)
   // Make sure the thumbnailer is started before starting the render manager.
   // The thumbnailer will want to listen for RVH creations, one of which will
   // happen in RVHManager::Init.
   ThumbnailGenerator* generator = g_browser_process->GetThumbnailGenerator();
@@ skipping 38 matching lines @@
   registrar_.Add(this, NotificationType::EXTENSION_LOADED,
                  NotificationService::AllSources());
   registrar_.Add(this, NotificationType::EXTENSION_UNLOADED,
                  NotificationService::AllSources());
   registrar_.Add(this, NotificationType::EXTENSION_UNLOADED_DISABLED,
                  NotificationService::AllSources());
 
   // Set-up the showing of the omnibox search infobar if applicable.
   if (OmniboxSearchHint::IsEnabled(profile))
     omnibox_search_hint_.reset(new OmniboxSearchHint(this));
+
+  renderer_accessible_ =
+    CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableRendererAccessibility);
 }
 
 TabContents::~TabContents() {
   is_being_destroyed_ = true;
 
   // We don't want any notifications while we're running our destructor.
   registrar_.RemoveAll();
 
   // Unregister the notifications of all observed prefs change.
   PrefService* prefs = profile()->GetPrefs();
@@ skipping 1768 matching lines @@
   details.set_error_code(error_code);
 
   NotificationService::current()->Notify(
       NotificationType::FAIL_PROVISIONAL_LOAD_WITH_ERROR,
       Source<NavigationController>(&controller_),
       Details<ProvisionalLoadDetails>(&details));
 }
 
 void TabContents::DocumentLoadedInFrame() {
   controller_.DocumentLoadedInFrame();
-
-  render_view_host()->SetDocumentLoaded(true);
+  if (renderer_accessible_ && !requested_accessibility_tree_) {
+    render_view_host()->RequestAccessibilityTree();
+    requested_accessibility_tree_ = true;
+  }
 }
 
 void TabContents::OnContentBlocked(ContentSettingsType type) {
   // TODO(joth): remove once fully implemented.
   DCHECK(type != CONTENT_SETTINGS_TYPE_GEOLOCATION);
   content_blocked_[type] = true;
   if (delegate_)
     delegate_->OnContentSettingsChange(this);
 }
 
@@ skipping 149 matching lines @@
       NotificationType::RENDER_VIEW_HOST_DELETED,
       Source<TabContents>(this),
       Details<RenderViewHost>(rvh));
   render_manager_.RenderViewDeleted(rvh);
 }
 
 void TabContents::DidNavigate(RenderViewHost* rvh,
                               const ViewHostMsg_FrameNavigate_Params& params) {
   int extra_invalidate_flags = 0;
 
-  render_view_host()->SetDocumentLoaded(false);
+  requested_accessibility_tree_ = false;
 
   if (PageTransition::IsMainFrame(params.transition)) {
     bool was_bookmark_bar_visible = ShouldShowBookmarkBar();
     bool was_extension_shelf_visible = IsExtensionShelfAlwaysVisible();
 
     render_manager_.DidNavigateMainFrame(rvh);
 
     if (was_bookmark_bar_visible != ShouldShowBookmarkBar())
       extra_invalidate_flags |= INVALIDATE_BOOKMARK_BAR;
     if (was_extension_shelf_visible != IsExtensionShelfAlwaysVisible())
@@ skipping 875 matching lines @@
   AddInfoBar(new SavePasswordInfoBarDelegate(this, form_to_save));
 }
 
 Profile* TabContents::GetProfileForPasswordManager() {
   return profile();
 }
 
 bool TabContents::DidLastPageLoadEncounterSSLErrors() {
   return controller().ssl_manager()->ProcessedSSLErrorFromRequest();
 }