Don't show host permission warnings for platform apps.

chrome/common/extensions/api/extension_api.cc

 // 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.
 
 #include "chrome/common/extensions/api/extension_api.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/values.h"
 #include "chrome/common/extensions/api/generated_schemas.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/features/simple_feature_provider.h"
+#include "chrome/common/extensions/permissions/permission_set.h"
 #include "googleurl/src/gurl.h"
 #include "grit/common_resources.h"
 #include "grit/extensions_api_resources.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 
 using base::DictionaryValue;
 using base::ListValue;
 using base::Value;
 
@@ skipping 810 matching lines @@
 
 void ExtensionAPI::LoadAllSchemas() {
   while (unloaded_schemas_.size()) {
     std::map<std::string, base::StringPiece>::iterator it =
         unloaded_schemas_.begin();
     LoadSchema(it->first, it->second);
   }
 }
 
 }  // namespace extensions