Extract and dispatch device uuid in media device attached notification message.

chrome/browser/chromeos/disks/disk_mount_manager.h

Index: chrome/browser/chromeos/disks/disk_mount_manager.h
diff --git a/chrome/browser/chromeos/disks/disk_mount_manager.h b/chrome/browser/chromeos/disks/disk_mount_manager.h
index c4e1d6ba011fa8ec9dab11b532acf3f6f8422618..df6dd185cd84b16ffe4b39f44da00bbbcdee7759 100644
--- a/chrome/browser/chromeos/disks/disk_mount_manager.h
+++ b/chrome/browser/chromeos/disks/disk_mount_manager.h
@@ -52,6 +52,7 @@ class DiskMountManager {
          const std::string& file_path,
          const std::string& device_label,
          const std::string& drive_label,
+         const std::string& fs_uuid,
          const std::string& system_path_prefix,
          DeviceType device_type,
          uint64 total_size_in_bytes,
@@ -85,6 +86,9 @@ class DiskMountManager {
     // (e.g. "TransMemory")
     const std::string& drive_label() const { return drive_label_; }
 
+    // Returns the file system uuid string.
+    const std::string& fs_uuid() const { return fs_uuid_; }
+
     // Path of the system device this device's block is a part of.
     // (e.g. /sys/devices/pci0000:00/.../8:0:0:0/)
     const std::string& system_path_prefix() const {
@@ -125,6 +129,7 @@ class DiskMountManager {
     std::string file_path_;
     std::string device_label_;
     std::string drive_label_;
+    std::string fs_uuid_;
     std::string system_path_prefix_;
     DeviceType device_type_;
     uint64 total_size_in_bytes_;