Add request header on gdata operation for testing ETag match.

chrome/browser/chromeos/drive/mock_drive_service.cc

Index: chrome/browser/chromeos/drive/mock_drive_service.cc
diff --git a/chrome/browser/chromeos/drive/mock_drive_service.cc b/chrome/browser/chromeos/drive/mock_drive_service.cc
index dc42a758ade0b58978a00a0d45b6275f2cea81fc..42f1e294c509611c212a91a374f7c114cab11915 100644
--- a/chrome/browser/chromeos/drive/mock_drive_service.cc
+++ b/chrome/browser/chromeos/drive/mock_drive_service.cc
@@ -32,9 +32,9 @@ MockDriveService::MockDriveService() {
   ON_CALL(*this, GetAccountMetadata(_))
       .WillByDefault(Invoke(this,
                             &MockDriveService::GetAccountMetadataStub));
-  ON_CALL(*this, DeleteDocument(_, _))
+  ON_CALL(*this, DeleteDocument(_, _, _))
       .WillByDefault(Invoke(this, &MockDriveService::DeleteDocumentStub));
-  ON_CALL(*this, DownloadDocument(_, _, _, _, _))
+  ON_CALL(*this, DownloadDocument(_, _, _, _, _, _))
       .WillByDefault(Invoke(this, &MockDriveService::DownloadDocumentStub));
   ON_CALL(*this, CopyDocument(_, _, _))
       .WillByDefault(Invoke(this, &MockDriveService::CopyDocumentStub));
@@ -48,7 +48,7 @@ MockDriveService::MockDriveService() {
           Invoke(this, &MockDriveService::RemoveResourceFromDirectoryStub));
   ON_CALL(*this, CreateDirectory(_, _, _))
       .WillByDefault(Invoke(this, &MockDriveService::CreateDirectoryStub));
-  ON_CALL(*this, DownloadFile(_, _, _, _, _))
+  ON_CALL(*this, DownloadFile(_, _, _, _, _, _))
       .WillByDefault(Invoke(this, &MockDriveService::DownloadFileStub));
 
   // Fill in the default values for mock feeds.
@@ -102,6 +102,7 @@ void MockDriveService::GetAccountMetadataStub(
 
 void MockDriveService::DeleteDocumentStub(
     const GURL& document_url,
+    const std::string& etag,
     const gdata::EntryActionCallback& callback) {
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,
@@ -113,6 +114,7 @@ void MockDriveService::DownloadDocumentStub(
     const FilePath& local_tmp_path,
     const GURL& content_url,
     DocumentExportFormat format,
+    const std::string& etag,
     const gdata::DownloadActionCallback& callback) {
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,
@@ -170,6 +172,7 @@ void MockDriveService::DownloadFileStub(
     const FilePath& virtual_path,
     const FilePath& local_tmp_path,
     const GURL& content_url,
+    const std::string& etag,
     const gdata::DownloadActionCallback& download_action_callback,
     const gdata::GetContentCallback& get_content_callback) {
   gdata::GDataErrorCode error = gdata::HTTP_SUCCESS;