Mark RFH::AllowInjectingJavaScriptForAndroidWebView as Android only.

chrome/common/chrome_isolated_world_ids.h

 // Copyright 2015 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_COMMON_CHROME_ISOLATED_WORLD_IDS_H_
 #define CHROME_COMMON_CHROME_ISOLATED_WORLD_IDS_H_
 
+#include "build/build_config.h"
 #include "content/public/common/isolated_world_ids.h"
 
 namespace chrome {
 
 enum ChromeIsolatedWorldIDs {
   // Isolated world ID for Chrome Translate.
   ISOLATED_WORLD_ID_TRANSLATE = content::ISOLATED_WORLD_ID_CONTENT_END + 1,
 
   // Isolated world ID for internal Chrome features.
   ISOLATED_WORLD_ID_CHROME_INTERNAL,
 
 #if defined(OS_MACOSX)
   // Isolated world ID for AppleScript.
   ISOLATED_WORLD_ID_APPLESCRIPT,
 #endif  // defined(OS_MACOSX)
 
   // Numbers for isolated worlds for extensions are set in
   // extensions/renderer/script_injection.cc, and are are greater than or equal
   // to this number.
   ISOLATED_WORLD_ID_EXTENSIONS
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_ISOLATED_WORLD_IDS_H_