Change how the quota system computes the total poolsize for temporary storage

chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc

Index: chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc
diff --git a/chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc b/chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc
index 5a059fd104c60a10ca5e9acce163af92e6adddd3..1ef9f305b127e37d3880634990e1dca2ab4d50dc 100644
--- a/chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc
+++ b/chrome/browser/extensions/api/sync_file_system/sync_file_system_browsertest.cc
@@ -18,6 +18,7 @@
 #include "chrome/browser/sync_file_system/sync_file_system_service.h"
 #include "chrome/browser/sync_file_system/sync_file_system_service_factory.h"
 #include "components/drive/service/fake_drive_service.h"
+#include "content/public/browser/storage_partition.h"
 #include "extensions/test/extension_test_message_listener.h"
 #include "extensions/test/result_catcher.h"
 #include "storage/browser/quota/quota_manager.h"
@@ -61,19 +62,6 @@ class SyncFileSystemTest : public extensions::PlatformAppBrowserTest,
       : remote_service_(NULL) {
   }
 
-  void SetUpInProcessBrowserTestFixture() override {
-    ExtensionApiTest::SetUpInProcessBrowserTestFixture();
-    real_minimum_preserved_space_ =
-        storage::QuotaManager::kMinimumPreserveForSystem;
-    storage::QuotaManager::kMinimumPreserveForSystem = 0;
-  }
-
-  void TearDownInProcessBrowserTestFixture() override {
-    storage::QuotaManager::kMinimumPreserveForSystem =
-        real_minimum_preserved_space_;
-    ExtensionApiTest::TearDownInProcessBrowserTestFixture();
-  }
-
   scoped_refptr<base::SequencedTaskRunner> MakeSequencedTaskRunner() {
     scoped_refptr<base::SequencedWorkerPool> worker_pool =
         content::BrowserThread::GetBlockingPool();
@@ -113,6 +101,15 @@ class SyncFileSystemTest : public extensions::PlatformAppBrowserTest,
     remote_service_->SetSyncEnabled(true);
     factory->set_mock_remote_file_service(
         std::unique_ptr<RemoteFileSyncService>(remote_service_));
+
+    const int kMeg = 1000 * 1024;
+    storage::TemporaryStorageConfiguration config;
+    config.pool_size = 25 * kMeg;
+    config.per_host_quota = 5 * kMeg;
+    config.must_remain_available =  0;
+    config.refresh_interval = base::TimeDelta::Max();
+    content::BrowserContext::GetDefaultStoragePartition(context)->
+        GetQuotaManager()->SetTemporaryStorageConfiguration(config);
   }
 
   // drive::FakeDriveService::ChangeObserver override.