Implement GetUploadStatusOperation on GData WAPI.

chrome/browser/google_apis/gdata_wapi_operations.h

Index: chrome/browser/google_apis/gdata_wapi_operations.h
diff --git a/chrome/browser/google_apis/gdata_wapi_operations.h b/chrome/browser/google_apis/gdata_wapi_operations.h
index 5dd8616007b4ebc247f7a174eae9ad7c7342fe0c..fe8272dd2b7f74aa2f6757c85f05606124f46380 100644
--- a/chrome/browser/google_apis/gdata_wapi_operations.h
+++ b/chrome/browser/google_apis/gdata_wapi_operations.h
@@ -561,6 +561,36 @@ class ResumeUploadOperation : public UploadRangeOperationBase {
   DISALLOW_COPY_AND_ASSIGN(ResumeUploadOperation);
 };
 
+//========================== GetUploadStatusOperation ==========================
+
+// This class performs the operation for getting the current upload status
+// of a file.

[satorux1, 2013/02/07 05:38:57]

Could you be more specific? What data we can get from this operation?

[hidehiko, 2013/02/07 06:34:57]

Done.

+class GetUploadStatusOperation : public UploadRangeOperationBase {
+ public:
+  // |callback| must not be null. See also UploadRangeOperationBase's
+  // constructor for more details.
+  // |content_length| is the whole data size to be uploaded, or -1 if it is
+  // unknown.
+  GetUploadStatusOperation(
+      OperationRegistry* registry,
+      net::URLRequestContextGetter* url_request_context_getter,
+      const UploadRangeCallback& callback,
+      UploadMode load_mode,
+      const FilePath& drive_file_path,
+      const GURL& upload_url,
+      int64 content_length);
+  virtual ~GetUploadStatusOperation();
+
+ protected:
+  // UrlFetchOperationBase overrides.
+  virtual std::vector<std::string> GetExtraRequestHeaders() const OVERRIDE;
+
+ private:
+  const int64 content_length_;
+
+  DISALLOW_COPY_AND_ASSIGN(GetUploadStatusOperation);
+};
+
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_GDATA_WAPI_OPERATIONS_H_