[fsp] Add support for providing thumbnails.

chrome/browser/chromeos/file_system_provider/operations/get_metadata.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/get_metadata.h"
 
 #include <string>
 
 #include "chrome/common/extensions/api/file_system_provider.h"
 #include "chrome/common/extensions/api/file_system_provider_internal.h"
@@ skipping 15 matching lines @@
     return false;
 
   output->name = params->metadata.name;
   output->is_directory = params->metadata.is_directory;
   output->size = static_cast<int64>(params->metadata.size);
 
   if (params->metadata.mime_type.get())
     output->mime_type = *params->metadata.mime_type.get();
 
   std::string input_modification_time;
   if (!params->metadata.modification_time.additional_properties.GetString(

[hirono, 2014/08/27 09:20:07]

Should update thumbnail here?

[mtomasz, 2014/08/28 04:57:55]

Oops. Fortunately the tests would catch it.

           "value", &input_modification_time)) {
     return false;
   }
 
   // Allow to pass invalid modification time, since there is no way to verify
   // it easily on any earlier stage.
   base::Time::FromString(input_modification_time.c_str(),
                          &output->modification_time);
 
   return true;
 }
 
 }  // namespace
 
 GetMetadata::GetMetadata(
     extensions::EventRouter* event_router,
     const ProvidedFileSystemInfo& file_system_info,
     const base::FilePath& entry_path,
+    ProvidedFileSystemInterface::MetadataFieldMask fields,
     const ProvidedFileSystemInterface::GetMetadataCallback& callback)
     : Operation(event_router, file_system_info),
       entry_path_(entry_path),
+      fields_(fields),
       callback_(callback) {
 }
 
 GetMetadata::~GetMetadata() {
 }
 
 bool GetMetadata::Execute(int request_id) {
   scoped_ptr<base::DictionaryValue> values(new base::DictionaryValue);
   values->SetString("entryPath", entry_path_.AsUTF8Unsafe());
+  values->SetBoolean(
+      "thumbnail",
+      (fields_ & ProvidedFileSystemInterface::METADATA_FIELD_THUMBNAIL) != 0);
+
   return SendEvent(
       request_id,
       extensions::api::file_system_provider::OnGetMetadataRequested::kEventName,
       values.Pass());
 }
 
 void GetMetadata::OnSuccess(int /* request_id */,
                             scoped_ptr<RequestValue> result,
                             bool has_more) {
   EntryMetadata metadata;
@@ skipping 11 matching lines @@
 
 void GetMetadata::OnError(int /* request_id */,
                           scoped_ptr<RequestValue> /* result */,
                           base::File::Error error) {
   callback_.Run(EntryMetadata(), error);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos