[Sync] Remove unneeded 'using syncer::' lines and 'syncer::' scopings

sync/api/sync_error.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 SYNC_API_SYNC_ERROR_H_
 #define SYNC_API_SYNC_ERROR_H_
 
 #include <iosfwd>
 #include <string>
 
@@ skipping 14 matching lines @@
 class SyncError {
  public:
   // Default constructor refers to "no error", and IsSet() will return false.
   SyncError();
 
   // Create a new Sync error triggered by datatype |type| with debug message
   // |message| from the specified location. IsSet() will return true.
   // Will print the new error to LOG(ERROR).
   SyncError(const tracked_objects::Location& location,
             const std::string& message,
-            syncer::ModelType type);
+            ModelType type);
 
   // Copy and assign via deep copy.
   SyncError(const SyncError& other);
   SyncError& operator=(const SyncError& other);
 
   ~SyncError();
 
   // Reset the current error to a new error. May be called irrespective of
   // whether IsSet() is true. After this is called, IsSet() will return true.
   // Will print the new error to LOG(ERROR).
   void Reset(const tracked_objects::Location& location,
              const std::string& message,
-             syncer::ModelType type);
+             ModelType type);
 
   // Whether this is a valid error or not.
   bool IsSet() const;
 
   // These must only be called if IsSet() is true.
   const tracked_objects::Location& location() const;
   const std::string& message() const;
-  syncer::ModelType type() const;
+  ModelType type() const;
 
   // Returns empty string is IsSet() is false.
   std::string ToString() const;
  private:
   // Print error information to log.
   void PrintLogError() const;
 
   // Make a copy of a SyncError. If other.IsSet() == false, this->IsSet() will
   // now return false.
   void Copy(const SyncError& other);
 
   // Initialize the local error data with the specified error data. After this
   // is called, IsSet() will return true.
   void Init(const tracked_objects::Location& location,
             const std::string& message,
-            syncer::ModelType type);
+            ModelType type);
 
   // Reset the error to it's default (unset) values.
   void Clear();
 
   // scoped_ptr is necessary because Location objects aren't assignable.
   scoped_ptr<tracked_objects::Location> location_;
   std::string message_;
-  syncer::ModelType type_;
+  ModelType type_;
 };
 
 // gmock printer helper.
 void PrintTo(const SyncError& sync_error, std::ostream* os);
 
 }  // namespace syncer
 
 #endif  // SYNC_API_SYNC_ERROR_H_