[FileManager] Do drive search incrementally

chrome/browser/chromeos/extensions/file_browser_private_api.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 "chrome/browser/chromeos/extensions/file_browser_private_api.h"
 
 #include <utility>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 2289 matching lines @@
     service->SetBoolean(prefs::kDisableGDataHostedFiles, tmp);
   }
 
   return true;
 }
 
 bool SearchDriveFunction::RunImpl() {
   if (!args_->GetString(0, &query_))
     return false;
 
+  if (!args_->GetString(1, &next_feed_))
+    return false;
+
   BrowserContext::GetFileSystemContext(profile())->OpenFileSystem(
       source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal, false,
       base::Bind(&SearchDriveFunction::OnFileSystemOpened, this));
   return true;
 }
 
 void SearchDriveFunction::OnFileSystemOpened(
     base::PlatformFileError result,
     const std::string& file_system_name,
     const GURL& file_system_url) {
   if (result != base::PLATFORM_FILE_OK) {
     SendResponse(false);
     return;
   }
 
   file_system_name_ = file_system_name;
   file_system_url_ = file_system_url;
 
   gdata::GDataSystemService* system_service =
       gdata::GDataSystemServiceFactory::GetForProfile(profile_);
   if (!system_service || !system_service->file_system()) {
     SendResponse(false);
     return;
   }
 
   system_service->file_system()->Search(
-      query_,
+      query_, GURL(next_feed_),
       base::Bind(&SearchDriveFunction::OnSearch, this));
 }
 
 void SearchDriveFunction::OnSearch(
     gdata::GDataFileError error,
+    const GURL& next_feed,
     scoped_ptr<std::vector<gdata::SearchResultInfo> > results) {
   if (error != gdata::GDATA_FILE_OK) {
     SendResponse(false);
     return;
   }
 
   DCHECK(results.get());
 
   base::ListValue* entries = new ListValue();
   // Convert gdata files to something File API stack can understand.
   for (size_t i = 0; i < results->size(); ++i) {
     DictionaryValue* entry = new DictionaryValue();
     entry->SetString("fileSystemName", file_system_name_);
     entry->SetString("fileSystemRoot", file_system_url_.spec());
     entry->SetString("fileFullPath", "/" + results->at(i).path.value());
     entry->SetBoolean("fileIsDirectory", results->at(i).is_directory);
 
     entries->Append(entry);
   }
 
-  SetResult(entries);
+  base::DictionaryValue* result = new DictionaryValue();
+  result->Set("entries", entries);
+  result->SetString("nextFeed", next_feed.spec());
+
+  SetResult(result);
   SendResponse(true);
 }
 
 bool GetNetworkConnectionStateFunction::RunImpl() {
   chromeos::NetworkLibrary* network_library =
       chromeos::CrosLibrary::Get()->GetNetworkLibrary();
   if (!network_library)
     return false;
 
   const chromeos::Network* active_network = network_library->active_network();
@@ skipping 23 matching lines @@
   gdata::GDataSystemService* system_service =
       gdata::GDataSystemServiceFactory::GetForProfile(profile_);
   if (!system_service || !system_service->file_system())
     return false;
 
   FilePath directory_path = GetVirtualPathFromURL(GURL(file_url_as_string));
   system_service->file_system()->RequestDirectoryRefresh(directory_path);
 
   return true;
 }