gdata: Support mouting archive file in GData cache

chrome/browser/chromeos/extensions/file_browser_private_api.cc

Index: chrome/browser/chromeos/extensions/file_browser_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.cc b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
index 67e85b4ba56e19118040382cf0d896efcc3daba3..2a94208440681a4032b70e675e87e8c5d8a61838 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.cc
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
@@ -1015,14 +1015,40 @@ void AddMountFunction::GetLocalPathsResponseOnUIThread(
   }
 
 #if defined(OS_CHROMEOS)
-  FilePath source_file = files[0].path;
-  DiskMountManager* disk_mount_manager = DiskMountManager::GetInstance();
-  // MountPath() takes a std::string.
-  disk_mount_manager->MountPath(source_file.AsUTF8Unsafe(),
-      DiskMountManager::MountTypeFromString(mount_type_str));
+  const FilePath& source_path = files[0].path;
+  const FilePath::StringType& display_name = files[0].display_name;
+  // Check if the source path is under GData cache directory.
+  gdata::GDataSystemService* system_service =
+      gdata::GDataSystemServiceFactory::GetForProfile(profile_);
+  if (system_service && system_service->file_system() &&
+      system_service->file_system()->IsUnderGDataCacheDirectory(source_path)) {
+    system_service->file_system()->SetMountedState(
+        source_path, true,
+        base::Bind(&AddMountFunction::OnMountedStateSet, this, mount_type_str,
+                   display_name));
+  } else {
+    OnMountedStateSet(mount_type_str, FilePath::StringType(),
+                      base::PLATFORM_FILE_OK, source_path);
+  }
+#else
+  SendResponse(true);
 #endif  // defined(OS_CHROMEOS)
+}
 
+void AddMountFunction::OnMountedStateSet(const std::string& mount_type,
+                                         const FilePath::StringType& file_name,
+                                         base::PlatformFileError error,
+                                         const FilePath& file_path) {
+#if defined(OS_CHROMEOS)
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DiskMountManager* disk_mount_manager = DiskMountManager::GetInstance();
+  // MountPath() takes a std::string.
+  disk_mount_manager->MountPath(file_path.AsUTF8Unsafe(),
+                                FilePath(file_name).Extension(),
+                                DiskMountManager::MountTypeFromString(
+                                    mount_type));
   SendResponse(true);
+#endif  // defined(OS_CHROMEOS)
 }
 
 RemoveMountFunction::RemoveMountFunction() {
@@ -1058,9 +1084,40 @@ void RemoveMountFunction::GetLocalPathsResponseOnUIThread(
     return;
   }
 #if defined(OS_CHROMEOS)
-  DiskMountManager::GetInstance()->UnmountPath(files[0].path.value());
-#endif
+  // Look up source path from mount path.
+  const std::string& mount_path = files[0].path.value();
+  DiskMountManager* disk_mount_manager = DiskMountManager::GetInstance();
+  DiskMountManager::MountPointMap mount_points =
+      disk_mount_manager->mount_points();
+  DiskMountManager::MountPointMap::const_iterator it =
+      mount_points.find(mount_path);
+  if (it == mount_points.end()) {
+    SendResponse(false);
+    return;
+  }
+  DiskMountManager::MountPointInfo mount_point_info = it->second;
+  FilePath source_path = FilePath(mount_point_info.source_path);
+  // Unmount archive.
+  disk_mount_manager->UnmountPath(mount_path);
+  // Check if the source path is under GData cache directory.
+  gdata::GDataSystemService* system_service =
+      gdata::GDataSystemServiceFactory::GetForProfile(profile_);
+  if (system_service && system_service->file_system() &&
+      system_service->file_system()->IsUnderGDataCacheDirectory(source_path)) {
+    system_service->file_system()->SetMountedState(
+        source_path, false,
+        base::Bind(&RemoveMountFunction::OnMountedStateSet, this));
+  } else {
+    OnMountedStateSet(base::PLATFORM_FILE_OK, source_path);
+  }
+#else
+  SendResponse(true);
+#endif  // defined(OS_CHROMEOS)
+}
 
+void RemoveMountFunction::OnMountedStateSet(base::PlatformFileError error,
+                                            const FilePath& file_path) {
+  // Ignore the file_path argument for now.
   SendResponse(true);
 }