Remove all blimp engine code

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;
-
-// Owns WebContents, handles operations such as navigation requests in the tab,
-// and has one-to-one mapping to a client tab.
-class Tab : public content::WebContentsObserver,
-            public PageLoadTrackerClient,
-            public EngineRenderWidgetFeature::RenderWidgetMessageDelegate {
- public:
-  // Caller ensures |render_widget_feature| and |navigation_message_sender|
-  // outlives this object.
-  // |web_contents|: the WebContents this tab owns.
-  // |tab_id|: the ID of this tab.
-  // |render_widget_feature|: render widget feature.
-  // |navigation_message_sender|: for sending navigation messages to client.
-  Tab(std::unique_ptr<content::WebContents> web_contents,
-      const int tab_id,
-      EngineRenderWidgetFeature* render_widget_feature,
-      BlimpMessageProcessor* navigation_message_sender);
-  ~Tab() override;
-
-  content::WebContents* web_contents() { return web_contents_.get(); }
-  int tab_id() const { return tab_id_; }
-
-  // Resizes the tab to |size_in_dips| with |device_pixel_ratio|.
-  void Resize(float device_pixel_ratio, const gfx::Size& size_in_dips);
-
-  // Handles tab navigation.
-  void LoadUrl(const GURL& url);
-  void GoBack();
-  void GoForward();
-  void Reload();
-
-  // Handles navigation state changed event.
-  void NavigationStateChanged(content::InvalidateTypes changed_flags);
-
-  // PageLoadTrackerClient implementation.
-  void SendPageLoadStatusUpdate(PageLoadStatus load_status) override;
-
-  // 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_