Extracting placeholder information from Webkit to Blimp

blimp/engine/session/blimp_engine_session.h

Index: blimp/engine/session/blimp_engine_session.h
diff --git a/blimp/engine/session/blimp_engine_session.h b/blimp/engine/session/blimp_engine_session.h
index f815a5a4102bbea8adf17761084503447995292e..b74d2de2f85e9fbb549b1ca5fa0da02e0d5f7a06 100644
--- a/blimp/engine/session/blimp_engine_session.h
+++ b/blimp/engine/session/blimp_engine_session.h
@@ -151,6 +151,10 @@ class BlimpEngineSession : public BlimpMessageProcessor,
   void OnInputMethodDestroyed(const ui::InputMethod* input_method) override;
   void OnShowImeIfNeeded() override;
 
+  // Sends text input field related information to the client.
+  void FetchTextInputInfo(const std::string& text,
+                          const std::string& placeholder);
+
   // Sets up |new_contents| to be associated with the root window.
   void PlatformSetContents(std::unique_ptr<content::WebContents> new_contents,
                            const int target_tab_id);
@@ -220,6 +224,8 @@ class BlimpEngineSession : public BlimpMessageProcessor,
   // TODO(haibinlu): Support more than one tab (crbug/547231)
   std::unique_ptr<Tab> tab_;
 
+  base::WeakPtrFactory<BlimpEngineSession> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(BlimpEngineSession);
 };