Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

apps/saved_files_service_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 
 #include "apps/saved_files_service.h"
 #include "base/files/file_path.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/values_test_util.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/test_extension_environment.h"
 #include "chrome/test/base/testing_profile.h"
 #include "extensions/browser/extension_prefs.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if !defined(OS_ANDROID)
 
 #define TRACE_CALL(expression) \
   do {                         \
     SCOPED_TRACE(#expression); \
     expression;                \
   } while (0)
@@ skipping 203 matching lines @@
 
   // This should push the sequence number to the limit of 8, and trigger a
   // sequence number compaction. Expect that the sequence numbers are
   // contiguous from 1 to 4.
   service_->EnqueueFileEntry(extension_->id(), GenerateId(3));
   TRACE_CALL(CheckRangeEnqueuedInOrder(0, 4));
   service_->Clear(extension_->id());
   TRACE_CALL(CheckRangeEnqueuedInOrder(0, 4));
 }
 #endif