Added network components for blimp text input feature

blimp/engine/session/blimp_engine_session.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_SESSION_BLIMP_ENGINE_SESSION_H_
 #define BLIMP_ENGINE_SESSION_BLIMP_ENGINE_SESSION_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/engine/feature/engine_render_widget_feature.h"
 #include "blimp/net/blimp_message_processor.h"
 #include "blimp/net/connection_error_observer.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "net/base/completion_callback.h"
+#include "ui/base/ime/input_method_observer.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace aura {
 class WindowTreeHost;
 
 namespace client {
 class DefaultCaptureClient;
 class WindowTreeClient;
 }  // namespace client
 }  // namespace aura
@@ skipping 30 matching lines @@
 class BlimpFocusClient;
 class BlimpScreen;
 class BlimpUiContextFactory;
 class BlimpWindowTreeHost;
 class EngineNetworkComponents;
 
 class BlimpEngineSession
     : public BlimpMessageProcessor,
       public content::WebContentsDelegate,
       public content::WebContentsObserver,
+      public ui::InputMethodObserver,
       public EngineRenderWidgetFeature::RenderWidgetMessageDelegate {
  public:
   BlimpEngineSession(scoped_ptr<BlimpBrowserContext> browser_context,
                      net::NetLog* net_log,
                      BlimpEngineConfig* config);
   ~BlimpEngineSession() override;
 
   // Starts the network stack on the IO thread, and sets default placeholder
   // values for e.g. screen size pending real values being supplied by the
   // client.
@@ skipping 48 matching lines @@
                           bool user_gesture,
                           bool last_unlocked_by_target) override;
   void CloseContents(content::WebContents* source) override;
   void ActivateContents(content::WebContents* contents) override;
   void ForwardCompositorProto(
       content::RenderWidgetHost* render_widget_host,
       const std::vector<uint8_t>& proto) override;
   void NavigationStateChanged(content::WebContents* source,
                               content::InvalidateTypes changed_flags) override;
 
+  // ui::InputMethodObserver overrides.

[nyquist, 2016/03/10 00:57:13]

Could this either move to the EngineRenderWidgetFeature, or a new feature
specific to IME?

+  void OnTextInputTypeChanged(const ui::TextInputClient* client) override;
+  void OnFocus() override;
+  void OnBlur() override;
+  void OnCaretBoundsChanged(const ui::TextInputClient* client) override;
+  void OnTextInputStateChanged(const ui::TextInputClient* client) override;
+  void OnInputMethodDestroyed(const ui::InputMethod* input_method) override;
+  void OnShowImeIfNeeded() override;
+
+  // Used to show/hide IME when user selects text input.
+  void ShowIme(bool show);

[nyquist, 2016/03/10 00:57:13]

Can this be 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;
 
   // Sets up and owns |new_contents|.
   void PlatformSetContents(scoped_ptr<content::WebContents> new_contents);
 
   // Content BrowserContext for this session.
@@ skipping 29 matching lines @@
   // Container for connection manager, authentication handler, and
   // browser connection handler. The components run on the I/O thread, and
   // this object is destroyed there.
   scoped_ptr<EngineNetworkComponents> net_components_;
 
   scoped_ptr<ThreadPipeManager> thread_pipe_manager_;
 
   // Used to send TAB_CONTROL or NAVIGATION messages to client.
   scoped_ptr<BlimpMessageProcessor> tab_control_message_sender_;
   scoped_ptr<BlimpMessageProcessor> navigation_message_sender_;
+  scoped_ptr<BlimpMessageProcessor> ime_message_sender_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpEngineSession);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_SESSION_BLIMP_ENGINE_SESSION_H_