Revert of Extracting placeholder information from Webkit to Blimp

blimp/engine/session/tab.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BLIMP_ENGINE_SESSION_TAB_H_
 #define BLIMP_ENGINE_SESSION_TAB_H_
 
 #include "base/macros.h"
 #include "blimp/engine/feature/engine_render_widget_feature.h"
 #include "blimp/engine/session/page_load_tracker.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/web_contents_observer.h"
 
 namespace content {
 class RenderViewHost;
 class WebContents;
-struct FormFieldData;
 }
 
 namespace blimp {
 
 class BlimpMessageProcessor;
 
 namespace engine {
 
 class EngineRenderWidgetFeature;
 
@@ skipping 35 matching lines @@
 
   // RenderWidgetMessage handler methods.
   // RenderWidgetMessageDelegate implementation.
   void OnWebGestureEvent(
       content::RenderWidgetHost* render_widget_host,
       std::unique_ptr<blink::WebGestureEvent> event) override;
   void OnCompositorMessageReceived(
       content::RenderWidgetHost* render_widget_host,
       const std::vector<uint8_t>& message) override;
 
-  // Text input related methods.
-  void ShowTextInputUI();
-  void HideTextInputUI();
-
  private:
   // content::WebContentsObserver implementation.
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
   void RenderViewHostChanged(content::RenderViewHost* old_host,
                              content::RenderViewHost* new_host) override;
   void RenderViewDeleted(content::RenderViewHost* render_view_host) override;
 
-  // Sends text input field related information to the client.
-  void ProcessTextInputInfo(int request_id,
-                            const content::FormFieldData& field_data);
-
   std::unique_ptr<content::WebContents> web_contents_;
   const int tab_id_;
   EngineRenderWidgetFeature* render_widget_feature_;
   BlimpMessageProcessor* navigation_message_sender_;
 
   // Tracks the page load status for a tab.
   PageLoadTracker page_load_tracker_;
 
-  // Tracks the number of text input requests.
-  int current_form_request_id_;
-
-  base::WeakPtrFactory<Tab> weak_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(Tab);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_SESSION_TAB_H_