Cleanup: Remove chrome namespace for storage monitor and media galleries.

chrome/browser/media_galleries/linux/mtp_read_file_worker.h

Index: chrome/browser/media_galleries/linux/mtp_read_file_worker.h
diff --git a/chrome/browser/media_galleries/linux/mtp_read_file_worker.h b/chrome/browser/media_galleries/linux/mtp_read_file_worker.h
index bbc6641bb564695d82a5e3401d6976bafc1a8bec..d330d19434bc58999543e918efce18438f14c4a0 100644
--- a/chrome/browser/media_galleries/linux/mtp_read_file_worker.h
+++ b/chrome/browser/media_galleries/linux/mtp_read_file_worker.h
@@ -16,8 +16,6 @@ namespace base {
 class FilePath;
 }
 
-namespace chrome {
-
 class SnapshotFileDetails;
 struct SnapshotRequestInfo;
 
@@ -88,6 +86,4 @@ class MTPReadFileWorker {
   DISALLOW_COPY_AND_ASSIGN(MTPReadFileWorker);
 };
 
-}  // namespace chrome
-
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_READ_FILE_WORKER_H_