[Extensions] Change renderer-side web accessible resource determination

extensions/common/manifest_handlers/webview_info.h

Index: extensions/common/manifest_handlers/webview_info.h
diff --git a/extensions/common/manifest_handlers/webview_info.h b/extensions/common/manifest_handlers/webview_info.h
index 5deb8970ac492c81a8bb768b9f515cc3f54f2857..58feb6e8f6549c8c4ab968d62b496d4846309a39 100644
--- a/extensions/common/manifest_handlers/webview_info.h
+++ b/extensions/common/manifest_handlers/webview_info.h
@@ -27,6 +27,10 @@ class WebviewInfo : public Extension::ManifestData {
   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);