Change chrome.filesystem to handle the Chrome OS Drive file entries directly.

chrome/browser/extensions/api/file_system/file_system_apitest.cc

 // Copyright (c) 2012 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 "base/file_util.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
 #include "chrome/browser/extensions/platform_app_browsertest_util.h"
 
 using extensions::FileSystemChooseEntryFunction;
 
 class FileSystemApiTest : public extensions::PlatformAppBrowserTest {
  public:
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     extensions::PlatformAppBrowserTest::SetUpCommandLine(command_line);
     test_root_folder_ = test_data_dir_.AppendASCII("api_test")
         .AppendASCII("file_system");
+    FileSystemChooseEntryFunction::RegisterTempExternalFileSystemForTest(
+        "test_root", test_root_folder_);
   }
 
   virtual void TearDown() OVERRIDE {
     FileSystemChooseEntryFunction::StopSkippingPickerForTest();
     extensions::PlatformAppBrowserTest::TearDown();
   };
 
  protected:
   base::FilePath TempFilePath(const std::string& destination_name,
                               bool copy_gold) {
     if (!temp_dir_.CreateUniqueTempDir()) {
       ADD_FAILURE() << "CreateUniqueTempDir failed";
       return base::FilePath();
     }
+    FileSystemChooseEntryFunction::RegisterTempExternalFileSystemForTest(
+        "test_temp", temp_dir_.path());
+
     base::FilePath destination = temp_dir_.path().AppendASCII(destination_name);
     if (copy_gold) {
       base::FilePath source = test_root_folder_.AppendASCII("gold.txt");
       EXPECT_TRUE(file_util::CopyFile(source, destination));
     }
     return destination;
   }
 
   base::FilePath test_root_folder_;
   base::ScopedTempDir temp_dir_;
@@ skipping 181 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemApiTest, FileSystemApiGetEntryId) {
   base::FilePath test_file = TempFilePath("writable.txt", true);
   ASSERT_FALSE(test_file.empty());
   FileSystemChooseEntryFunction::SkipPickerAndAlwaysSelectPathForTest(
       &test_file);
   ASSERT_TRUE(RunPlatformAppTest(
       "api_test/file_system/get_entry_id")) << message_;
 }