Switch from MountLibrary to CrosDisksLibrary

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 4dbb3eb95b715bb22e9656492ccf9a5a71285a0b..c5c9da9752bd746a4a57e334c0c912128374c36b 100644
--- a/chrome/browser/chromeos/disks/disk_mount_manager.h
+++ b/chrome/browser/chromeos/disks/disk_mount_manager.h
@@ -236,6 +236,12 @@ class DiskMountManager {
   // Creates the global DiskMountManager instance.
   static void Initialize();
 
+  // Similar to Initialize(), but can inject an alternative
+  // DiskMountManager such as MockDiskMountManager for testing.
+  // The injected object will be owned by the internal pointer and deleted
+  // by Shutdown().
+  static void InitializeForTesting(DiskMountManager* disk_mount_manager);
+
   // Destroys the global DiskMountManager instance if it exists.
   static void Shutdown();