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

chrome/browser/chromeos/disks/mock_disk_mount_manager.cc

Index: chrome/browser/chromeos/disks/mock_disk_mount_manager.cc
diff --git a/chrome/browser/chromeos/disks/mock_disk_mount_manager.cc b/chrome/browser/chromeos/disks/mock_disk_mount_manager.cc
index 80558e0dc797bba5c9dd382535405c65f5c66720..65ba9da8fe99ce3b0b23a983c1e904ac714ad49a 100644
--- a/chrome/browser/chromeos/disks/mock_disk_mount_manager.cc
+++ b/chrome/browser/chromeos/disks/mock_disk_mount_manager.cc
@@ -26,6 +26,7 @@ const char* kTestMountPath = "/media/foofoo";
 const char* kTestFilePath = "/this/file/path";
 const char* kTestDeviceLabel = "A label";
 const char* kTestDriveLabel = "Another label";
+const char* kTestUuid = "FFFF-FFFF";
 
 }  // namespace
 
@@ -60,6 +61,7 @@ void MockDiskMountManager::NotifyDeviceInsertEvents() {
       std::string(kTestFilePath),
       std::string(),
       std::string(kTestDriveLabel),
+      std::string(kTestUuid),
       std::string(kTestSystemPathPrefix),
       DEVICE_TYPE_USB,
       4294967295U,
@@ -90,6 +92,7 @@ void MockDiskMountManager::NotifyDeviceInsertEvents() {
       std::string(kTestFilePath),
       std::string(kTestDeviceLabel),
       std::string(kTestDriveLabel),
+      std::string(kTestUuid),
       std::string(kTestSystemPathPrefix),
       DEVICE_TYPE_MOBILE,
       1073741824,
@@ -112,6 +115,7 @@ void MockDiskMountManager::NotifyDeviceRemoveEvents() {
       std::string(kTestSystemPath),
       std::string(kTestFilePath),
       std::string(kTestDeviceLabel),
+      std::string(kTestUuid),
       std::string(kTestDriveLabel),
       std::string(kTestSystemPathPrefix),
       DEVICE_TYPE_SD,