Initialize member variables from all constructors

content/browser/accessibility/browser_accessibility_manager.cc

Index: content/browser/accessibility/browser_accessibility_manager.cc
diff --git a/content/browser/accessibility/browser_accessibility_manager.cc b/content/browser/accessibility/browser_accessibility_manager.cc
index ebf3a99e8a5f65aba3acd77bdae4b813c64838bd..f2d4da7d24d9600734b5d83f294b571ceab818e9 100644
--- a/content/browser/accessibility/browser_accessibility_manager.cc
+++ b/content/browser/accessibility/browser_accessibility_manager.cc
@@ -141,6 +141,8 @@ BrowserAccessibilityManager::BrowserAccessibilityManager(
       tree_(new ui::AXSerializableTree()),
       user_is_navigating_away_(false),
       osk_state_(OSK_ALLOWED),
+      last_focused_node_(nullptr),
+      last_focused_manager_(nullptr),
       ax_tree_id_(AXTreeIDRegistry::kNoAXTreeID),
       parent_node_id_from_parent_tree_(0) {
   tree_->SetDelegate(this);