[Extensions] Change renderer-side web accessible resource determination

extensions/common/manifest_handlers/webview_info.cc

 // Copyright 2014 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 "extensions/common/manifest_handlers/webview_info.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 68 matching lines @@
     if (item->Matches(partition_id) &&
         extension->ResourceMatches(item->accessible_resources(),
                                    relative_path)) {
       return true;
     }
   }
 
   return false;
 }
 
+// static
+bool WebviewInfo::HasWebviewAccessibleResources(
+    const Extension& extension,
+    const std::string& partition_id) {
+  const WebviewInfo* webview_info = static_cast<const WebviewInfo*>(
+      extension.GetManifestData(keys::kWebviewAccessibleResources));
+  if (!webview_info)
+    return false;
+
+  for (const auto& item : webview_info->partition_items_) {
+    if (item->Matches(partition_id))
+      return true;
+  }
+  return false;
+}
+
 void WebviewInfo::AddPartitionItem(std::unique_ptr<PartitionItem> item) {
   partition_items_.push_back(std::move(item));
 }
 
 WebviewHandler::WebviewHandler() {
 }
 
 WebviewHandler::~WebviewHandler() {
 }
 
@@ skipping 70 matching lines @@
   extension->SetManifestData(keys::kWebviewAccessibleResources,
                              std::move(info));
   return true;
 }
 
 const std::vector<std::string> WebviewHandler::Keys() const {
   return SingleKey(keys::kWebview);
 }
 
 }  // namespace extensions