Add Accessibility name for native buttons.

views/controls/button/native_button.cc

Index: views/controls/button/native_button.cc
diff --git a/views/controls/button/native_button.cc b/views/controls/button/native_button.cc
index 5bdc9c739c411f6efe10ccae21894b53ce2fe6dc..7890ee61248748b18e1dfa0c6e57aca1bee2bffe 100644
--- a/views/controls/button/native_button.cc
+++ b/views/controls/button/native_button.cc
@@ -77,6 +77,9 @@ void NativeButton::SetLabel(const std::wstring& label) {
 
   if (native_wrapper_)
     native_wrapper_->UpdateLabel();
+
+  // Update the accessible name whenever the label changes.
+  SetAccessibleName(label);
 }
 
 void NativeButton::SetIsDefault(bool is_default) {