Add flag to enable experimental features for input view.

ui/keyboard/keyboard_util.cc

Index: ui/keyboard/keyboard_util.cc
diff --git a/ui/keyboard/keyboard_util.cc b/ui/keyboard/keyboard_util.cc
index 9c89e6442b3a4ca5119511cfff249e1b63fdb3f1..ebc987ffa3aaf86038bb39206293f230f0d0a0a7 100644
--- a/ui/keyboard/keyboard_util.cc
+++ b/ui/keyboard/keyboard_util.cc
@@ -145,6 +145,14 @@ bool IsInputViewEnabled() {
   return true;
 }
 
+bool IsExperimentalInputViewEnabled() {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableExperimentalInputViewFeatures)) {
+    return true;
+  }
+  return false;
+}
+
 bool InsertText(const base::string16& text, aura::Window* root_window) {
   if (!root_window)
     return false;