Revert 46567 - Reimplement accessibility of web content by caching the entire...

chrome/browser/tab_contents/tab_contents.cc

Index: chrome/browser/tab_contents/tab_contents.cc
===================================================================
--- chrome/browser/tab_contents/tab_contents.cc	(revision 46641)
+++ chrome/browser/tab_contents/tab_contents.cc	(working copy)
@@ -290,8 +290,7 @@
       is_showing_before_unload_dialog_(false),
       renderer_preferences_(),
       opener_dom_ui_type_(DOMUIFactory::kNoDOMUI),
-      language_state_(&controller_),
-      requested_accessibility_tree_(false) {
+      language_state_(&controller_) {
   ClearBlockedContentSettings();
   renderer_preferences_util::UpdateFromSystemSettings(
       &renderer_preferences_, profile);
@@ -349,10 +348,6 @@
   // 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() {
@@ -2131,10 +2126,6 @@
 
 void TabContents::DocumentLoadedInFrame() {
   controller_.DocumentLoadedInFrame();
-  if (renderer_accessible_ && !requested_accessibility_tree_) {
-    render_view_host()->RequestAccessibilityTree();
-    requested_accessibility_tree_ = true;
-  }
 }
 
 void TabContents::OnContentBlocked(ContentSettingsType type) {
@@ -2304,8 +2295,6 @@
                               const ViewHostMsg_FrameNavigate_Params& params) {
   int extra_invalidate_flags = 0;
 
-  requested_accessibility_tree_ = false;
-
   if (PageTransition::IsMainFrame(params.transition)) {
     bool was_bookmark_bar_visible = ShouldShowBookmarkBar();
     bool was_extension_shelf_visible = IsExtensionShelfAlwaysVisible();