Add an option to not prune the Android AX tree, to preserve more style info.

content/browser/accessibility/browser_accessibility_manager_android.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 "content/browser/accessibility/browser_accessibility_manager_android.h"
 
 #include <cmath>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 52 matching lines @@
 BrowserAccessibilityManagerAndroid*
 BrowserAccessibilityManager::ToBrowserAccessibilityManagerAndroid() {
   return static_cast<BrowserAccessibilityManagerAndroid*>(this);
 }
 
 BrowserAccessibilityManagerAndroid::BrowserAccessibilityManagerAndroid(
     ScopedJavaLocalRef<jobject> content_view_core,
     const ui::AXTreeUpdate& initial_tree,
     BrowserAccessibilityDelegate* delegate,
     BrowserAccessibilityFactory* factory)
-    : BrowserAccessibilityManager(delegate, factory) {
+    : BrowserAccessibilityManager(delegate, factory),
+      prune_tree_for_screen_reader_(true) {
   Initialize(initial_tree);
   SetContentViewCore(content_view_core);
 }
 
 BrowserAccessibilityManagerAndroid::~BrowserAccessibilityManagerAndroid() {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
 
@@ skipping 662 matching lines @@
 BrowserAccessibilityManagerAndroid::UseRootScrollOffsetsWhenComputingBounds() {
   // The Java layer handles the root scroll offset.
   return false;
 }
 
 bool RegisterBrowserAccessibilityManager(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content