Add support for refreshing contents of providers which don't support watchers.

chrome/browser/chromeos/file_system_provider/operations/write_file_unittest.cc

 // Copyright 2014 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 "chrome/browser/chromeos/file_system_provider/operations/write_file.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file.h"
@@ skipping 29 matching lines @@
 class FileSystemProviderOperationsWriteFileTest : public testing::Test {
  protected:
   FileSystemProviderOperationsWriteFileTest() {}
   ~FileSystemProviderOperationsWriteFileTest() override {}
 
   void SetUp() override {
     MountOptions mount_options(kFileSystemId, "" /* display_name */);
     mount_options.writable = true;
     file_system_info_ = ProvidedFileSystemInfo(
         kExtensionId, mount_options, base::FilePath(), false /* configurable */,
-        extensions::SOURCE_FILE);
+        true /* watchable */, extensions::SOURCE_FILE);
     io_buffer_ = make_scoped_refptr(new net::StringIOBuffer(kWriteData));
   }
 
   ProvidedFileSystemInfo file_system_info_;
   scoped_refptr<net::StringIOBuffer> io_buffer_;
 };
 
 TEST_F(FileSystemProviderOperationsWriteFileTest, Execute) {
   using extensions::api::file_system_provider::WriteFileRequestedOptions;
 
@@ skipping 53 matching lines @@
   EXPECT_FALSE(write_file.Execute(kRequestId));
 }
 
 TEST_F(FileSystemProviderOperationsWriteFileTest, Execute_ReadOnly) {
   util::LoggingDispatchEventImpl dispatcher(true /* dispatch_reply */);
   util::StatusCallbackLog callback_log;
 
   const ProvidedFileSystemInfo read_only_file_system_info(
       kExtensionId, MountOptions(kFileSystemId, "" /* display_name */),
       base::FilePath() /* mount_path */, false /* configurable */,
-      extensions::SOURCE_FILE);
+      true /* watchable */, extensions::SOURCE_FILE);
 
   WriteFile write_file(NULL,
                        read_only_file_system_info,
                        kFileHandle,
                        io_buffer_.get(),
                        kOffset,
                        io_buffer_->size(),
                        base::Bind(&util::LogStatusCallback, &callback_log));
   write_file.SetDispatchEventImplForTesting(
       base::Bind(&util::LoggingDispatchEventImpl::OnDispatchEventImpl,
@@ skipping 47 matching lines @@
                      scoped_ptr<RequestValue>(new RequestValue()),
                      base::File::FILE_ERROR_TOO_MANY_OPENED);
 
   ASSERT_EQ(1u, callback_log.size());
   EXPECT_EQ(base::File::FILE_ERROR_TOO_MANY_OPENED, callback_log[0]);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos