[fsp] Unmount file systems when the providing extension gets unloaded.

chrome/browser/chromeos/file_manager/volume_manager_unittest.cc

Index: chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
diff --git a/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc b/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
index dadc90662ff62a0bb7d4c8656db4550c0ebf885d..196aaebffb9c9d6609db368be47d9115dc44e32b 100644
--- a/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
+++ b/chrome/browser/chromeos/file_manager/volume_manager_unittest.cc
@@ -18,6 +18,7 @@
 #include "chromeos/dbus/fake_power_manager_client.h"
 #include "chromeos/disks/disk_mount_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "extensions/browser/extension_registry.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace file_manager {
@@ -145,8 +146,12 @@ class VolumeManagerTest : public testing::Test {
     ProfileEnvironment(chromeos::PowerManagerClient* power_manager_client,
                        chromeos::disks::DiskMountManager* disk_manager)
         : profile_(new TestingProfile),
+          extension_registry_(
+              new extensions::ExtensionRegistry(profile_.get())),
           file_system_provider_service_(
-              new chromeos::file_system_provider::Service(profile_.get())),
+              new chromeos::file_system_provider::Service(
+                  profile_.get(),
+                  extension_registry_.get())),
           volume_manager_(
               new VolumeManager(profile_.get(),
                                 NULL,  // DriveIntegrationService
@@ -162,6 +167,7 @@ class VolumeManagerTest : public testing::Test {
 
    private:
     scoped_ptr<TestingProfile> profile_;
+    scoped_ptr<extensions::ExtensionRegistry> extension_registry_;
     scoped_ptr<chromeos::file_system_provider::Service>
         file_system_provider_service_;
     scoped_ptr<VolumeManager> volume_manager_;