[Media Router] Increment the media's current_time in the WebUI route controller

chrome/common/media_router/mojo/media_status_struct_traits.h

 // Copyright 2017 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 CHROME_COMMON_MEDIA_ROUTER_MOJO_MEDIA_STATUS_STRUCT_TRAITS_H_
 #define CHROME_COMMON_MEDIA_ROUTER_MOJO_MEDIA_STATUS_STRUCT_TRAITS_H_
 
 #include <string>
 
 #include "chrome/common/media_router/media_status.h"
 #include "chrome/common/media_router/mojo/media_status.mojom.h"
 #include "mojo/common/common_custom_types_struct_traits.h"
 
 namespace mojo {
 
-// MediaStatus
+template <>
+struct EnumTraits<media_router::mojom::MediaStatus::PlayState,
+                  media_router::MediaStatus::PlayState> {
+  static media_router::mojom::MediaStatus::PlayState ToMojom(
+      media_router::MediaStatus::PlayState play_state) {
+    switch (play_state) {
+      case media_router::MediaStatus::PlayState::PLAYING:
+        return media_router::mojom::MediaStatus::PlayState::PLAYING;
+      case media_router::MediaStatus::PlayState::PAUSED:
+        return media_router::mojom::MediaStatus::PlayState::PAUSED;
+      case media_router::MediaStatus::PlayState::BUFFERING:
+        return media_router::mojom::MediaStatus::PlayState::BUFFERING;
+    }
+    NOTREACHED() << "Unknown play state " << static_cast<int>(play_state);
+    return media_router::mojom::MediaStatus::PlayState::PLAYING;
+  }
+
+  static bool FromMojom(media_router::mojom::MediaStatus::PlayState input,
+                        media_router::MediaStatus::PlayState* output) {
+    switch (input) {
+      case media_router::mojom::MediaStatus::PlayState::PLAYING:
+        *output = media_router::MediaStatus::PlayState::PLAYING;
+        return true;
+      case media_router::mojom::MediaStatus::PlayState::PAUSED:
+        *output = media_router::MediaStatus::PlayState::PAUSED;
+        return true;
+      case media_router::mojom::MediaStatus::PlayState::BUFFERING:
+        *output = media_router::MediaStatus::PlayState::BUFFERING;
+        return true;
+    }
+    return false;

[dcheng, 2017/06/20 21:18:05]

For enum traits, it's actually OK to NOTREACHED() this as well.

mojo enums basically go through double validation... =(

[takumif, 2017/06/20 23:56:31]

Done.

+  }
+};
 
 template <>
 struct StructTraits<media_router::mojom::MediaStatusDataView,
                     media_router::MediaStatus> {
   static bool Read(media_router::mojom::MediaStatusDataView data,
                    media_router::MediaStatus* out);
 
   static const std::string& title(const media_router::MediaStatus& status) {
     return status.title;
   }
@@ skipping 12 matching lines @@
   }
 
   static bool can_set_volume(const media_router::MediaStatus& status) {
     return status.can_set_volume;
   }
 
   static bool can_seek(const media_router::MediaStatus& status) {
     return status.can_seek;
   }
 
-  static bool is_paused(const media_router::MediaStatus& status) {
-    return status.is_paused;
+  static media_router::MediaStatus::PlayState play_state(
+      const media_router::MediaStatus& status) {
+    return status.play_state;
   }
 
   static bool is_muted(const media_router::MediaStatus& status) {
     return status.is_muted;
   }
 
   static float volume(const media_router::MediaStatus& status) {
     return status.volume;
   }
 
   static base::TimeDelta duration(const media_router::MediaStatus& status) {
     return status.duration;
   }
 
   static base::TimeDelta current_time(const media_router::MediaStatus& status) {
     return status.current_time;
   }
 };
 
 }  // namespace mojo
 
 #endif  // CHROME_COMMON_MEDIA_ROUTER_MOJO_MEDIA_STATUS_STRUCT_TRAITS_H_