Introduce WebRequestEventRouterDelegate.

extensions/browser/api/web_request/web_request_api_utils.cc

 // Copyright (c) 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/browser/api/web_request/web_request_api_utils.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 
 namespace extension_web_request_api_utils {
 
 namespace {
 
 static const char* kResourceTypeStrings[] = {
   "main_frame",
   "sub_frame",
   "stylesheet",
   "script",
   "image",
   "object",
   "xmlhttprequest",
   "other",
   "other",
 };
 
+const size_t kResourceTypeStringsLength = arraysize(kResourceTypeStrings);
+
 static ResourceType kResourceTypeValues[] = {
   content::RESOURCE_TYPE_MAIN_FRAME,
   content::RESOURCE_TYPE_SUB_FRAME,
   content::RESOURCE_TYPE_STYLESHEET,
   content::RESOURCE_TYPE_SCRIPT,
   content::RESOURCE_TYPE_IMAGE,
   content::RESOURCE_TYPE_OBJECT,
   content::RESOURCE_TYPE_XHR,
   content::RESOURCE_TYPE_LAST_TYPE,  // represents "other"
   // TODO(jochen): We duplicate the last entry, so the array's size is not a
   // power of two. If it is, this triggers a bug in gcc 4.4 in Release builds
   // (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43949). Once we use a version
   // of gcc with this bug fixed, or the array is changed so this duplicate
   // entry is no longer required, this should be removed.
   content::RESOURCE_TYPE_LAST_TYPE,
 };
 
+const size_t kResourceTypeValuesLength = arraysize(kResourceTypeValues);
+
 }
 
 #define ARRAYEND(array) (array + arraysize(array))
 
 bool IsRelevantResourceType(ResourceType type) {
   ResourceType* iter =
-      std::find(kResourceTypeValues, ARRAYEND(kResourceTypeValues), type);
-  return iter != ARRAYEND(kResourceTypeValues);
+      std::find(kResourceTypeValues,
+                kResourceTypeValues + kResourceTypeValuesLength,
+                type);
+  return iter != (kResourceTypeValues + kResourceTypeValuesLength);
 }
 
 const char* ResourceTypeToString(ResourceType type) {
   ResourceType* iter =
-      std::find(kResourceTypeValues, ARRAYEND(kResourceTypeValues), type);
-  if (iter == ARRAYEND(kResourceTypeValues))
+      std::find(kResourceTypeValues,
+                kResourceTypeValues + kResourceTypeValuesLength,
+                type);
+  if (iter == (kResourceTypeValues + kResourceTypeValuesLength))
     return "other";
 
   return kResourceTypeStrings[iter - kResourceTypeValues];
 }
 
 bool ParseResourceType(const std::string& type_str,
                        ResourceType* type) {
   const char** iter =
-      std::find(kResourceTypeStrings, ARRAYEND(kResourceTypeStrings), type_str);
-  if (iter == ARRAYEND(kResourceTypeStrings))
+      std::find(kResourceTypeStrings,
+                kResourceTypeStrings + kResourceTypeStringsLength,
+                type_str);
+  if (iter == (kResourceTypeStrings + kResourceTypeStringsLength))
     return false;
   *type = kResourceTypeValues[iter - kResourceTypeStrings];
   return true;
 }
 
 }  // namespace extension_web_request_api_utils