Add support for faster, more limited accessibility modes.

content/renderer/accessibility/render_accessibility_impl_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 <tuple>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
@@ skipping 14 matching lines @@
 #include "ui/accessibility/ax_node_data.h"
 
 using blink::WebAXObject;
 using blink::WebDocument;
 
 namespace content {
 
 class TestRenderAccessibilityImpl : public RenderAccessibilityImpl {
  public:
   explicit TestRenderAccessibilityImpl(RenderFrameImpl* render_frame)
-    : RenderAccessibilityImpl(render_frame) {
+      : RenderAccessibilityImpl(render_frame, ACCESSIBILITY_MODE_COMPLETE) {
   }
 
   void SendPendingAccessibilityEvents() {
     RenderAccessibilityImpl::SendPendingAccessibilityEvents();
   }
 };
 
 class RenderAccessibilityImplTest : public RenderViewTest {
  public:
   RenderAccessibilityImplTest() {}
@@ skipping 216 matching lines @@
 
   ASSERT_EQ(3U, event.update.nodes.size());
   EXPECT_EQ(node_a.axID(), event.update.node_id_to_clear);
   EXPECT_EQ(node_a.axID(), event.update.nodes[0].id);
   EXPECT_EQ(node_b.axID(), event.update.nodes[1].id);
   EXPECT_EQ(node_c.axID(), event.update.nodes[2].id);
   EXPECT_EQ(3, CountAccessibilityNodesSentToBrowser());
 }
 
 }  // namespace content