[FileManager] Do drive search incrementally

chrome/browser/chromeos/extensions/file_browser_private_api.cc

Index: chrome/browser/chromeos/extensions/file_browser_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.cc b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
index 4c71fc28269b1b78d9cdbaf899f6c7e8f261a577..adafc1f707d6479e235140cb371c8162f80901e8 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.cc
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.cc
@@ -2296,6 +2296,9 @@ 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));
@@ -2322,12 +2325,13 @@ void SearchDriveFunction::OnFileSystemOpened(
   }
 
   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);
@@ -2348,7 +2352,11 @@ void SearchDriveFunction::OnSearch(
     entries->Append(entry);
   }
 
-  SetResult(entries);
+  base::DictionaryValue* result = new DictionaryValue();
+  result->Set("entries", entries);
+  result->SetString("nextFeed", next_feed.spec());
+
+  SetResult(result);
   SendResponse(true);
 }