Wired GDataFileSystem::GetFile() method with internal cache.

chrome/browser/chromeos/gdata/gdata_operations.cc

Index: chrome/browser/chromeos/gdata/gdata_operations.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_operations.cc b/chrome/browser/chromeos/gdata/gdata_operations.cc
index a0df4d8f45279ca722e2b77b3016bb8de2302f92..fde6b225982bf727abac1d7a930f7e8d8309df08 100644
--- a/chrome/browser/chromeos/gdata/gdata_operations.cc
+++ b/chrome/browser/chromeos/gdata/gdata_operations.cc
@@ -187,6 +187,9 @@ void UrlFetchOperationBase::Start(const std::string& auth_token) {
   if (save_temp_file_) {
     url_fetcher_->SaveResponseToTemporaryFile(
         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
+  } else if (!output_file_path_.empty()){
+    url_fetcher_->SaveResponseToFileAtPath(output_file_path_,
+        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
   }
 
   // Add request headers.
@@ -427,7 +430,8 @@ DownloadFileOperation::DownloadFileOperation(
     Profile* profile,
     const DownloadActionCallback& callback,
     const GURL& document_url,
-    const FilePath& virtual_path)
+    const FilePath& virtual_path,
+    const FilePath& output_file_path)
     : UrlFetchOperationBase(registry,
                             GDataOperationRegistry::OPERATION_DOWNLOAD,
                             virtual_path,
@@ -435,7 +439,10 @@ DownloadFileOperation::DownloadFileOperation(
       callback_(callback),
       document_url_(document_url) {
   // Make sure we download the content into a temp file.
-  save_temp_file_ = true;
+  if (output_file_path.empty())
+    save_temp_file_ = true;
+  else
+    output_file_path_ = output_file_path;
 }
 
 DownloadFileOperation::~DownloadFileOperation() {}