Move theme files in chrome/browser/ into a themes/ subdir.

chrome/browser/themes/browser_theme_provider.h

Index: chrome/browser/themes/browser_theme_provider.h
diff --git a/chrome/browser/browser_theme_provider.h b/chrome/browser/themes/browser_theme_provider.h
similarity index 98%
rename from chrome/browser/browser_theme_provider.h
rename to chrome/browser/themes/browser_theme_provider.h
index 9381ae2e0eb3fde76d8d6219b242cdaf87187db3..565047e747d4b4d8cb699e1d45b9c9065da7c52e 100644
--- a/chrome/browser/browser_theme_provider.h
+++ b/chrome/browser/themes/browser_theme_provider.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_BROWSER_THEME_PROVIDER_H_
-#define CHROME_BROWSER_BROWSER_THEME_PROVIDER_H_
+#ifndef CHROME_BROWSER_THEMES_BROWSER_THEME_PROVIDER_H_
+#define CHROME_BROWSER_THEMES_BROWSER_THEME_PROVIDER_H_
 #pragma once
 
 #include <map>
@@ -272,4 +272,4 @@ class BrowserThemeProvider : public NonThreadSafe,
   DISALLOW_COPY_AND_ASSIGN(BrowserThemeProvider);
 };
 
-#endif  // CHROME_BROWSER_BROWSER_THEME_PROVIDER_H_
+#endif  // CHROME_BROWSER_THEMES_BROWSER_THEME_PROVIDER_H_