[ChromeOS] Show autofill popup after keyboard (if any) is shown.

ui/base/ime/dummy_input_method.cc

Index: ui/base/ime/dummy_input_method.cc
diff --git a/ui/base/ime/dummy_input_method.cc b/ui/base/ime/dummy_input_method.cc
index 700e793dd81f66e0fcf392ad9ebc4cdfe42c0528..d4aa9e41d5de36e08c84c0d02d240ef25ce62f03 100644
--- a/ui/base/ime/dummy_input_method.cc
+++ b/ui/base/ime/dummy_input_method.cc
@@ -86,6 +86,13 @@ bool DummyInputMethod::IsCandidatePopupOpen() const {
 void DummyInputMethod::ShowImeIfNeeded() {
 }
 
+void DummyInputMethod::SetSupportsOnScreenKeyboard(bool supports) {
+}
+
+bool DummyInputMethod::SupportsOnScreenKeyboard() const {
+  return false;
+}
+
 void DummyInputMethod::AddObserver(InputMethodObserver* observer) {
 }