Move StringPiece into the base namespace. It is colliding

base/file_path.cc

 // Copyright (c) 2008 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.
 
 #include "base/file_path.h"
 #include "base/logging.h"
 
 // These includes are just for the *Hack functions, and should be removed
 // when those functions are removed.
 #include "base/string_piece.h"
@@ skipping 292 matching lines @@
     }
   }
 
   StringType ext = Extension();
   StringType ret = RemoveExtension().value();
   ret.append(suffix);
   ret.append(ext);
   return FilePath(ret);
 }
 
-FilePath FilePath::InsertBeforeExtensionASCII(const StringPiece& suffix) const {
+FilePath FilePath::InsertBeforeExtensionASCII(const base::StringPiece& suffix)
+    const {
   DCHECK(IsStringASCII(suffix));
 #if defined(OS_WIN)
   return InsertBeforeExtension(ASCIIToWide(suffix));
 #elif defined(OS_POSIX)
   return InsertBeforeExtension(suffix.as_string());
 #endif
 }
 
 FilePath FilePath::ReplaceExtension(const StringType& extension) const {
   if (path_.empty())
@@ skipping 66 matching lines @@
   }
 
   new_path.path_.append(component);
   return new_path;
 }
 
 FilePath FilePath::Append(const FilePath& component) const {
   return Append(component.value());
 }
 
-FilePath FilePath::AppendASCII(const StringPiece& component) const {
+FilePath FilePath::AppendASCII(const base::StringPiece& component) const {
   DCHECK(IsStringASCII(component));
 #if defined(OS_WIN)
   return Append(ASCIIToWide(component));
 #elif defined(OS_POSIX)
   return Append(component.as_string());
 #endif
 }
 
 bool FilePath::IsAbsolute() const {
   return IsPathAbsolute(path_);
@@ skipping 57 matching lines @@
 
   std::vector<FilePath::StringType>::const_iterator it = components.begin();
   for (; it != components.end(); ++it) {
     const FilePath::StringType& component = *it;
     if (component == kParentDirectory)
       return true;
   }
   return false;
 }