Move StringPiece into the base namespace. It is colliding

chrome/browser/dom_ui/dom_ui_theme_source.cc

 // Copyright (c) 2009 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 "chrome/browser/dom_ui/dom_ui_theme_source.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "app/theme_provider.h"
 #include "base/gfx/png_encoder.h"
@@ skipping 163 matching lines @@
   subst2.push_back(SkColorToRGBAString(color_section_border));  // $$2
   subst2.push_back(SkColorToRGBAString(color_section_text));  // $$3
   subst2.push_back(SkColorToRGBAString(color_section_link));  // $$4
   subst2.push_back(
       UTF8ToUTF16(tp->HasCustomImage(IDR_THEME_NTP_ATTRIBUTION) ?
           "block" : "none"));  // $$5
   subst2.push_back(SkColorToRGBAString(color_link_underline));  // $$6
   subst2.push_back(SkColorToRGBAString(color_section_link_underline));  // $$7
 
   // Get our template.
-  static const StringPiece new_tab_theme_css(
+  static const base::StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
       IDR_NEW_TAB_THEME_CSS));
 
   // Create the string from our template and the replacements.
   string16 format_string = ASCIIToUTF16(new_tab_theme_css.as_string());
   const std::string css_string = UTF16ToASCII(ReplaceStringPlaceholders(
       format_string, subst, NULL));
   new_tab_css_ = UTF16ToASCII(ReplaceStringPlaceholders(
       ASCIIToUTF16(css_string), subst2, NULL));
 }
@@ skipping 13 matching lines @@
   subst.push_back(WideToUTF16(
       profile_->GetPrefs()->GetString(prefs::kCurrentThemeID)));  // $1
 
   // Colors.
   subst.push_back(SkColorToRGBAString(color_background));  // $2
   subst.push_back(UTF8ToUTF16(GetNewTabBackgroundCSS(false)));  // $3
   subst.push_back(UTF8ToUTF16(GetNewTabBackgroundCSS(true)));  // $4
   subst.push_back(UTF8ToUTF16(GetNewTabBackgroundTilingCSS()));  // $5
 
   // Get our template.
-  static const StringPiece new_tab_theme_css(
+  static const base::StringPiece new_tab_theme_css(
       ResourceBundle::GetSharedInstance().GetRawDataResource(
       IDR_NEW_INCOGNITO_TAB_THEME_CSS));
 
   // Create the string from our template and the replacements.
   string16 format_string = ASCIIToUTF16(new_tab_theme_css.as_string());
   new_incognito_tab_css_ = UTF16ToASCII(ReplaceStringPlaceholders(
       format_string, subst, NULL));
 }
 
 void DOMUIThemeSource::SendNewTabCSS(int request_id,
@@ skipping 55 matching lines @@
   return BrowserThemeProvider::AlignmentToString(alignment);
 }
 
 std::string DOMUIThemeSource::GetNewTabBackgroundTilingCSS() {
   int repeat_mode;
   profile_->GetThemeProvider()->GetDisplayProperty(
       BrowserThemeProvider::NTP_BACKGROUND_TILING, &repeat_mode);
   return BrowserThemeProvider::TilingToString(repeat_mode);
 }