Add support for X11 workspaces

components/sessions/core/session_service_commands.cc

Index: components/sessions/core/session_service_commands.cc
diff --git a/components/sessions/core/session_service_commands.cc b/components/sessions/core/session_service_commands.cc
index 5d3cbf4ddc3b6818b54c148e234c7aa56cb9ca68..d67898e2695b476dbb518ebe4b75ace26c7a3202 100644
--- a/components/sessions/core/session_service_commands.cc
+++ b/components/sessions/core/session_service_commands.cc
@@ -42,6 +42,7 @@ static const SessionCommand::id_type kCommandSetTabUserAgentOverride = 18;
 static const SessionCommand::id_type kCommandSessionStorageAssociated = 19;
 static const SessionCommand::id_type kCommandSetActiveWindow = 20;
 static const SessionCommand::id_type kCommandLastActiveTime = 21;
+static const SessionCommand::id_type kCommandSetWindowWorkspace = 22;
 
 namespace {
 
@@ -88,6 +89,8 @@ typedef IDAndIndexPayload WindowTypePayload;
 
 typedef IDAndIndexPayload TabNavigationPathPrunedFromFrontPayload;
 
+typedef IDAndIndexPayload SetWindowWorkspacePayload;
+
 struct PinnedStatePayload {
   SessionID::id_type tab_id;
   bool pinned_state;
@@ -580,6 +583,16 @@ bool CreateTabsAndWindows(const ScopedVector<SessionCommand>& data,
         break;
       }
 
+      case kCommandSetWindowWorkspace: {
+        SetWindowWorkspacePayload payload;
+        if (!command->GetPayload(&payload, sizeof(payload))) {
+          DVLOG(1) << "Failed reading command " << command->id();
+          return true;
+        }
+        GetWindow(payload.id, windows)->workspace_id = payload.index;
+        break;
+      }
+
       default:
         // TODO(skuhne): This might call back into a callback handler to extend
         // the command set for specific implementations.
@@ -739,6 +752,18 @@ std::unique_ptr<SessionCommand> CreateLastActiveTimeCommand(
   return command;
 }
 
+std::unique_ptr<SessionCommand> CreateSetWindowWorkspaceCommand(
+    const SessionID& window_id,
+    int current_desktop) {
+  SetWindowWorkspacePayload payload = {0};
+  payload.id = window_id.id();
+  payload.index = current_desktop;
+  std::unique_ptr<SessionCommand> command(
+      new SessionCommand(kCommandSetWindowWorkspace, sizeof(payload)));
+  memcpy(command->contents(), &payload, sizeof(payload));
+  return command;
+}
+
 std::unique_ptr<SessionCommand> CreateTabNavigationPathPrunedFromBackCommand(
     const SessionID& tab_id,
     int count) {