Send network online/offline state to DriveFS.

Bug: b:110464348
Change-Id: I356c9411d76cbbc5d0cad51a4aad65eadd600c6b
Reviewed-on: https://chromium-review.googlesource.com/1179118Reviewed-by: Stuart Langley <slangley@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583977}

chrome/browser/chromeos/drive/drive_integration_service.cc

@@ -263,9 +263,10 @@ class DriveIntegrationService::PreferenceWatcher
     if (!integration_service_->GetDriveFsInterface())
       return;
 
-    integration_service_->GetDriveFsInterface()->SetPauseSyncing(
+    integration_service_->GetDriveFsInterface()->UpdateNetworkState(
         net::NetworkChangeNotifier::IsConnectionCellular(type) &&
-        pref_service_->GetBoolean(prefs::kDisableDriveOverCellular));
+            pref_service_->GetBoolean(prefs::kDisableDriveOverCellular),
+        type == net::NetworkChangeNotifier::CONNECTION_NONE);
   }
 
   PrefService* pref_service_;

chromeos/components/drivefs/fake_drivefs.cc

@@ -183,6 +183,6 @@ void FakeDriveFs::SetPinned(const base::FilePath& path,
   std::move(callback).Run(drive::FILE_ERROR_OK);
 }
 
-void FakeDriveFs::SetPauseSyncing(bool pause) {}
+void FakeDriveFs::UpdateNetworkState(bool pause_syncing, bool is_offline) {}
 
 }  // namespace drivefs

chromeos/components/drivefs/fake_drivefs.h

@@ -53,7 +53,7 @@ class FakeDriveFs : public drivefs::mojom::DriveFs,
                  bool pinned,
                  SetPinnedCallback callback) override;
 
-  void SetPauseSyncing(bool pause) override;
+  void UpdateNetworkState(bool pause_syncing, bool is_offline) override;
 
   const base::FilePath mount_path_;
 

chromeos/components/drivefs/mojom/drivefs.mojom

@@ -30,8 +30,9 @@ interface DriveFs {
   // |pinned|.
   SetPinned(mojo_base.mojom.FilePath path, bool pinned) => (FileError error);
 
-  // Set whether syncing should be paused.
-  SetPauseSyncing(bool pause);
+  // Update DriveFS with the current network state, including whether the
+  // network is available and whether syncing should be paused.
+  UpdateNetworkState(bool pause_syncing, bool is_offline);
 };
 
 // Implemented by Chrome, used from DriveFS.