Implemented proper support for checking schemes and requested resource types.

chrome/browser/extensions/api/web_request/web_request_api_helpers.h

Index: chrome/browser/extensions/api/web_request/web_request_api_helpers.h
diff --git a/chrome/browser/extensions/api/web_request/web_request_api_helpers.h b/chrome/browser/extensions/api/web_request/web_request_api_helpers.h
index 4392540dc548422b96821daa539be49d7c796f33..98796578f164bfec90df1bf9902d3a27c4f61569 100644
--- a/chrome/browser/extensions/api/web_request/web_request_api_helpers.h
+++ b/chrome/browser/extensions/api/web_request/web_request_api_helpers.h
@@ -21,6 +21,7 @@
 #include "net/base/net_log.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
+#include "webkit/glue/resource_type.h"
 
 namespace base {
 class ListValue;
@@ -181,6 +182,20 @@ bool MergeOnAuthRequiredResponses(
 // Returns true if requests for |url| shall not be reported to extensions.
 bool HideRequestForURL(const GURL& url);
 
+// Returns whether |type| is a ResourceType that is handled by the web request
+// API.
+bool IsRelevantResourceType(ResourceType::Type type);
+
+// Returns a string representation of |type| or |other| if |type| is not handled
+// by the web request API.
+const char* ResourceTypeToString(ResourceType::Type type);
+
+// Stores a |ResourceType::Type| representation in |type| if |type_str| is
+// a resource type handled by the web request API. Returns true in case of
+// success.
+bool ParseResourceType(const std::string& type_str,
+                       ResourceType::Type* type);
+
 }  // namespace extension_web_request_api_helpers
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_REQUEST_WEB_REQUEST_API_HELPERS_H_