Improve the notifications sent from AXTree updates.

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 706 matching lines @@
 
   return true;
 }
 
 void BrowserAccessibilityManagerAndroid::SetAccessibilityFocus(
     JNIEnv* env, jobject obj, jint id) {
   if (delegate_)
     delegate_->AccessibilitySetAccessibilityFocus(id);
 }
 
-void BrowserAccessibilityManagerAndroid::OnRootChanged(ui::AXNode* new_root) {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
-  if (obj.is_null())
-    return;
+void BrowserAccessibilityManagerAndroid::OnAtomicUpdateFinished(
+    bool root_changed,
+    const std::vector<ui::AXTreeDelegate::Change>& changes) {
+  if (root_changed) {
+    JNIEnv* env = AttachCurrentThread();
+    ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+    if (obj.is_null())
+      return;
 
-  Java_BrowserAccessibilityManager_handleNavigate(env, obj.obj());
+    Java_BrowserAccessibilityManager_handleNavigate(env, obj.obj());
+  }
 }
 
 bool
 BrowserAccessibilityManagerAndroid::UseRootScrollOffsetsWhenComputingBounds() {
   // The Java layer handles the root scroll offset.
   return false;
 }
 
 bool RegisterBrowserAccessibilityManager(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content