Improve the notifications sent from AXTree updates.

content/browser/accessibility/browser_accessibility_manager_android.cc

Index: content/browser/accessibility/browser_accessibility_manager_android.cc
diff --git a/content/browser/accessibility/browser_accessibility_manager_android.cc b/content/browser/accessibility/browser_accessibility_manager_android.cc
index fd4e0ff9fae105d09adb16902722cef6165da6b3..ef7cd01e824d23db54d0a72d3f7ae4345588cb1c 100644
--- a/content/browser/accessibility/browser_accessibility_manager_android.cc
+++ b/content/browser/accessibility/browser_accessibility_manager_android.cc
@@ -724,13 +724,17 @@ void BrowserAccessibilityManagerAndroid::SetAccessibilityFocus(
     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;
-
-  Java_BrowserAccessibilityManager_handleNavigate(env, obj.obj());
+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());
+  }
 }
 
 bool