[Blimp] Adds blimp engine browser test framework and LoadUrl test.

blimp/client/feature/ime_feature.h

Index: blimp/client/feature/ime_feature.h
diff --git a/blimp/client/feature/ime_feature.h b/blimp/client/feature/ime_feature.h
index cf29cc29711eb25f86f8174d121d88b0b14e0ecd..a61ba2bf6c35d73173046c5ac0730529fe47089a 100644
--- a/blimp/client/feature/ime_feature.h
+++ b/blimp/client/feature/ime_feature.h
@@ -33,6 +33,7 @@ class ImeFeature : public BlimpMessageProcessor {
   // A delegate to be notified of text input requests.
   class Delegate {
    public:
+    virtual ~Delegate() {}
     virtual void OnShowImeRequested(ui::TextInputType input_type,
                                     const std::string& text) = 0;
     virtual void OnHideImeRequested() = 0;