Reland of Extracting placeholder information from Webkit to Blimp

blimp/engine/feature/engine_render_widget_feature.h

 // Copyright 2015 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_FEATURE_ENGINE_RENDER_WIDGET_FEATURE_H_
 #define BLIMP_ENGINE_FEATURE_ENGINE_RENDER_WIDGET_FEATURE_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <vector>
 
 #include "base/atomic_sequence_num.h"
 #include "base/containers/small_map.h"
 #include "base/macros.h"
 #include "blimp/engine/app/settings_manager.h"
 #include "blimp/net/blimp_message_processor.h"
 #include "blimp/net/input_message_converter.h"
 #include "ui/base/ime/text_input_client.h"
 
 namespace blink {
 class WebGestureEvent;
 }
 
 namespace content {
 class RenderWidgetHost;
+struct FormFieldData;
 }
 
 namespace blimp {
 namespace engine {
 
 // Handles all incoming and outgoing protobuf message types tied to a specific
 // RenderWidget. This includes BlimpMessage::INPUT, BlimpMessage::COMPOSITOR,
 // and BlimpMessage::RENDER_WIDGET messages.  Delegates can be added to be
 // notified of incoming messages. This class automatically handles dropping
 // stale BlimpMessage::RENDER_WIDGET messages from the client after a
@@ skipping 48 matching lines @@
   // Only one RenderWidget can be in initialized state for a tab.
   void OnRenderWidgetInitialized(const int tab_id,
                                  content::RenderWidgetHost* render_widget_host);
 
   void OnRenderWidgetDeleted(const int tab_id,
                              content::RenderWidgetHost* render_widget_host);
 
   // Notifies the client to show/hide IME.
   void SendShowImeRequest(const int tab_id,
                           content::RenderWidgetHost* render_widget_host,
-                          const ui::TextInputClient* client);
+                          const content::FormFieldData& field);
   void SendHideImeRequest(const int tab_id,
                           content::RenderWidgetHost* render_widget_host);
 
   // Sends a CompositorMessage for |tab_id| to the client.
   void SendCompositorMessage(const int tab_id,
                              content::RenderWidgetHost* render_widget_host,
                              const std::vector<uint8_t>& message);
 
   // Sets a RenderWidgetMessageDelegate to be notified of all incoming
   // RenderWidget related messages for |tab_id| from the client.  There can only
@@ skipping 77 matching lines @@
 
   base::WeakPtrFactory<EngineRenderWidgetFeature> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EngineRenderWidgetFeature);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_FEATURE_ENGINE_RENDER_WIDGET_FEATURE_H_