gdrive: Get JSON feeds parsing off the UI thread.

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 e0057eb392b823f9288ef945bfcda7c37497b55f..93a86dd3081f29c003dac6b4afe12ee1cb159a8d 100644
--- a/chrome/browser/chromeos/gdata/gdata_operations.cc
+++ b/chrome/browser/chromeos/gdata/gdata_operations.cc
@@ -261,8 +261,9 @@ void DownloadFileOperation::OnURLFetchDownloadData(
     get_download_data_callback_.Run(HTTP_SUCCESS, download_data.Pass());
 }
 
-bool DownloadFileOperation::ProcessURLFetchResults(
-    const URLFetcher* source) {
+void DownloadFileOperation::ProcessURLFetchResults(
+    const URLFetcher* source,
+    const ProcessURLFetchResultsCallback& result_callback) {
   GDataErrorCode code = GetErrorCode(source);
 
   // Take over the ownership of the the downloaded temp file.
@@ -275,7 +276,7 @@ bool DownloadFileOperation::ProcessURLFetchResults(
 
   if (!download_action_callback_.is_null())
     download_action_callback_.Run(code, document_url_, temp_file);
-  return code == HTTP_SUCCESS;
+  result_callback.Run(code == HTTP_SUCCESS);
 }
 
 void DownloadFileOperation::RunCallbackOnPrematureFailure(GDataErrorCode code) {
@@ -477,11 +478,12 @@ AuthorizeAppsOperation::GetExtraRequestHeaders() const {
   return headers;
 }
 
-bool AuthorizeAppsOperation::ProcessURLFetchResults(
-    const URLFetcher* source) {
+void AuthorizeAppsOperation::ProcessURLFetchResults(
+    const URLFetcher* source,
+    const ProcessURLFetchResultsCallback& result_callback) {
   std::string data;
   source->GetResponseAsString(&data);
-  return GetDataOperation::ProcessURLFetchResults(source);
+  GetDataOperation::ProcessURLFetchResults(source, result_callback);
 }
 
 bool AuthorizeAppsOperation::GetContentData(std::string* upload_content_type,
@@ -502,7 +504,10 @@ bool AuthorizeAppsOperation::GetContentData(std::string* upload_content_type,
   return true;
 }
 
-base::Value* AuthorizeAppsOperation::ParseResponse(const std::string& data) {
+void AuthorizeAppsOperation::ParseResponse(
+    GDataErrorCode fetch_error_code,
+    const std::string& data,
+    const ProcessURLFetchResultsCallback& result_callback) {
   // Parse entry XML.
   XmlReader xml_reader;
   scoped_ptr<DocumentEntry> entry;
@@ -531,7 +536,9 @@ base::Value* AuthorizeAppsOperation::ParseResponse(const std::string& data) {
     }
   }
 
-  return link_list.release();
+  RunCallback(fetch_error_code, link_list.PassAs<base::Value>());
+  const bool success = true;
+  result_callback.Run(success);
 }
 
 GURL AuthorizeAppsOperation::GetURL() const {
@@ -644,8 +651,9 @@ GURL InitiateUploadOperation::GetURL() const {
   return initiate_upload_url_;
 }
 
-bool InitiateUploadOperation::ProcessURLFetchResults(
-    const URLFetcher* source) {
+void InitiateUploadOperation::ProcessURLFetchResults(
+    const URLFetcher* source,
+    const ProcessURLFetchResultsCallback& result_callback) {
   GDataErrorCode code = GetErrorCode(source);
 
   std::string upload_location;
@@ -661,7 +669,7 @@ bool InitiateUploadOperation::ProcessURLFetchResults(
 
   if (!callback_.is_null())
     callback_.Run(code, GURL(upload_location));
-  return code == HTTP_SUCCESS;
+  result_callback.Run(code == HTTP_SUCCESS);
 }
 
 void InitiateUploadOperation::NotifySuccessToOperationRegistry() {
@@ -748,8 +756,9 @@ GURL ResumeUploadOperation::GetURL() const {
   return params_.upload_location;
 }
 
-bool ResumeUploadOperation::ProcessURLFetchResults(
-    const URLFetcher* source) {
+void ResumeUploadOperation::ProcessURLFetchResults(
+    const URLFetcher* source,
+    const ProcessURLFetchResultsCallback& result_callback) {
   GDataErrorCode code = GetErrorCode(source);
   net::HttpResponseHeaders* hdrs = source->GetResponseHeaders();
   int64 start_range_received = -1;
@@ -810,7 +819,7 @@ bool ResumeUploadOperation::ProcessURLFetchResults(
     last_chunk_completed_ = true;
   }
 
-  return last_chunk_completed_ || code == HTTP_RESUME_INCOMPLETE;
+  result_callback.Run(last_chunk_completed_ || code == HTTP_RESUME_INCOMPLETE);
 }
 
 void ResumeUploadOperation::NotifyStartToOperationRegistry() {