[Media Galleries] Move RemovableStorageInfo notifications to chrome namespace (part 2)

chrome/browser/system_monitor/removable_device_notifications_mac.mm

Index: chrome/browser/system_monitor/removable_device_notifications_mac.mm
diff --git a/chrome/browser/system_monitor/removable_device_notifications_mac.mm b/chrome/browser/system_monitor/removable_device_notifications_mac.mm
index 89fa5866118df8727cab290fd7dee98a23fa8b82..4f249829e4a0c6dc18dff653f520a6ff6208ecd5 100644
--- a/chrome/browser/system_monitor/removable_device_notifications_mac.mm
+++ b/chrome/browser/system_monitor/removable_device_notifications_mac.mm
@@ -98,7 +98,7 @@ void RemovableDeviceNotificationsMac::UpdateDisk(
     // notification now. This is used for devices that are being removed or
     // devices that have changed.
     if (ShouldPostNotificationForDisk(it->second)) {
-      base::SystemMonitor::Get()->ProcessRemovableStorageDetached(
+      ProcessRemovableStorageDetached(
           it->second.device_id());
     }
   }
@@ -113,7 +113,7 @@ void RemovableDeviceNotificationsMac::UpdateDisk(
     if (ShouldPostNotificationForDisk(info)) {
       string16 display_name = GetDisplayNameForDevice(
           info.total_size_in_bytes(), info.device_name());
-      base::SystemMonitor::Get()->ProcessRemovableStorageAttached(
+      ProcessRemovableStorageAttached(
           info.device_id(), display_name, info.mount_point().value());
     }
   }
@@ -121,7 +121,7 @@ void RemovableDeviceNotificationsMac::UpdateDisk(
 
 bool RemovableDeviceNotificationsMac::GetDeviceInfoForPath(
     const FilePath& path,
-    base::SystemMonitor::RemovableStorageInfo* device_info) const {
+    RemovableStorageInfo* device_info) const {
   if (!path.IsAbsolute())
     return false;