Makes sure the keyboard typing isn't blocked when InputMethod::OnFocus() is not correctly called.

ui/base/ime/mock_input_method.cc

Index: ui/base/ime/mock_input_method.cc
diff --git a/ui/base/ime/mock_input_method.cc b/ui/base/ime/mock_input_method.cc
index f2cf8ebc67f5c4a29848e5740006f573c640027d..e09e2a84452fb4e42b3602e8b97a203c6d743b78 100644
--- a/ui/base/ime/mock_input_method.cc
+++ b/ui/base/ime/mock_input_method.cc
@@ -5,6 +5,7 @@
 #include "ui/base/ime/mock_input_method.h"
 
 #include "ui/base/ime/input_method_delegate.h"
+#include "ui/base/ime/input_method_log_collector.h"
 #include "ui/events/event.h"
 
 namespace ui {
@@ -116,4 +117,8 @@ void MockInputMethod::RemoveObserver(InputMethodObserver* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
+InputMethodLogCollector* MockInputMethod::GetLogCollector() {
+  return nullptr;
+}
+
 }  // namespace ui