[Extensions] Change renderer-side web accessible resource determination

extensions/common/manifest_handlers/webview_info.h

 // 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.
 
 #ifndef EXTENSIONS_COMMON_MANIFEST_HANDLERS_WEBVIEW_INFO_H_
 #define EXTENSIONS_COMMON_MANIFEST_HANDLERS_WEBVIEW_INFO_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_handler.h"
 
 namespace extensions {
 
 class PartitionItem;
 
 // A class to hold the <webview> accessible extension resources
 // that may be specified in the manifest of an extension using the
 // "webview" key.
 class WebviewInfo : public Extension::ManifestData {
  public:
   // Returns true if |extension|'s resource at |relative_path| is accessible
   // from the WebView partition with ID |partition_id|.
   static bool IsResourceWebviewAccessible(const Extension* extension,
                                           const std::string& partition_id,
                                           const std::string& relative_path);
+  // Returns true if the given |extension| has any webview accessible
+  // resources in the given |partition_id|.
+  static bool HasWebviewAccessibleResources(const Extension& extension,
+                                            const std::string& partition_id);
 
   // Define out of line constructor/destructor to please Clang.
   explicit WebviewInfo(const std::string& extension_id);
   ~WebviewInfo() override;
 
   void AddPartitionItem(std::unique_ptr<PartitionItem> item);
 
  private:
   std::string extension_id_;
   std::vector<std::unique_ptr<PartitionItem>> partition_items_;
@@ skipping 11 matching lines @@
 
  private:
   const std::vector<std::string> Keys() const override;
 
   DISALLOW_COPY_AND_ASSIGN(WebviewHandler);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_MANIFEST_HANDLERS_WEBVIEW_INFO_H_