Add GetChangelist operation for Drive V2.

chrome/browser/chromeos/gdata/drive_api_operations.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_API_OPERATIONS_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_API_OPERATIONS_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 29 matching lines @@
   virtual ~GetApplistOperation();
 
  protected:
   // Overridden from GetDataOperation.
   virtual GURL GetURL() const OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GetApplistOperation);
 };
 
+//============================ GetChangelistOperation ==========================
+
+// This class performs the operation for fetching changelist.
+class GetChangelistOperation : public GetDataOperation {
+ public:
+  // |start_changestamp| specifies the starting point of change list or 0 if
+  // all changes are necessary.
+  // |url| specifies URL for document feed fetching operation. If empty URL is
+  // passed, the default URL is used and returns the first page of the result.
+  // When non-first page result is requested, |url| should be specified.
+  GetChangelistOperation(GDataOperationRegistry* registry,
+                         const GURL& url,
+                         int64 start_changestamp,
+                         const GetDataCallback& callback);
+  virtual ~GetChangelistOperation();
+
+ protected:
+  // Overridden from GetDataOperation.
+  virtual GURL GetURL() const OVERRIDE;
+
+ private:
+  GURL url_;
+  int64 start_changestamp_;
+
+  DISALLOW_COPY_AND_ASSIGN(GetChangelistOperation);
+};
+
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_DRIVE_API_OPERATIONS_H_