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

chrome/browser/storage_monitor/volume_mount_watcher_win.cc

Index: chrome/browser/storage_monitor/volume_mount_watcher_win.cc
diff --git a/chrome/browser/storage_monitor/volume_mount_watcher_win.cc b/chrome/browser/storage_monitor/volume_mount_watcher_win.cc
index a4e19f2da02a8d9c514532a09db4d269e0f447de..5d0eb71794c3ddb3e518a9b228f170bdc3ca8050 100644
--- a/chrome/browser/storage_monitor/volume_mount_watcher_win.cc
+++ b/chrome/browser/storage_monitor/volume_mount_watcher_win.cc
@@ -27,8 +27,6 @@
 
 using content::BrowserThread;
 
-namespace chrome {
-
 namespace {
 
 const DWORD kMaxPathBufLen = MAX_PATH + 1;
@@ -527,5 +525,3 @@ void VolumeMountWatcherWin::EjectDevice(
       FROM_HERE,
       base::Bind(&EjectDeviceInThreadPool, device, callback, task_runner_, 0));
 }
-
-}  // namespace chrome