Use C++11 range-based loop in core/fetch

Source/core/fetch/Resource.cpp

Index: Source/core/fetch/Resource.cpp
diff --git a/Source/core/fetch/Resource.cpp b/Source/core/fetch/Resource.cpp
index 92c8f3671b2e3d25128c6255c1432327b77cc627..df69fb7535ed226adf0bf95ce4c42e734d286dbf 100644
--- a/Source/core/fetch/Resource.cpp
+++ b/Source/core/fetch/Resource.cpp
@@ -623,9 +623,7 @@ void Resource::finishPendingClients()
     Vector<ResourceClient*> clientsToNotify;
     copyToVector(m_clientsAwaitingCallback, clientsToNotify);
 
-    for (size_t i = 0; i < clientsToNotify.size(); ++i) {
-        ResourceClient* client = clientsToNotify[i];
-
+    for (const auto& client : clientsToNotify) {
         // Handle case (2) to skip removed clients.
         if (!m_clientsAwaitingCallback.remove(client))
             continue;
@@ -695,9 +693,7 @@ void Resource::switchClientsToRevalidatedResource()
     m_resourceToRevalidate->m_identifier = m_identifier;
 
     m_switchingClientsToRevalidatedResource = true;
-    HashSet<ResourcePtrBase*>::iterator end = m_handlesToRevalidate.end();
-    for (HashSet<ResourcePtrBase*>::iterator it = m_handlesToRevalidate.begin(); it != end; ++it) {
-        ResourcePtrBase* handle = *it;
+    for (const auto& handle : m_handlesToRevalidate) {
         handle->m_resource = m_resourceToRevalidate;
         m_resourceToRevalidate->registerHandle(handle);
         --m_handleCount;
@@ -706,12 +702,10 @@ void Resource::switchClientsToRevalidatedResource()
     m_handlesToRevalidate.clear();
 
     Vector<ResourceClient*> clientsToMove;
-    HashCountedSet<ResourceClient*>::iterator end2 = m_clients.end();
-    for (HashCountedSet<ResourceClient*>::iterator it = m_clients.begin(); it != end2; ++it) {
-        ResourceClient* client = it->key;
-        unsigned count = it->value;
+    for (const auto& clientHash : m_clients) {
+        unsigned count = clientHash.value;
         while (count) {
-            clientsToMove.append(client);
+            clientsToMove.append(clientHash.key);
             --count;
         }
     }
@@ -741,16 +735,15 @@ void Resource::updateResponseAfterRevalidation(const ResourceResponse& validatin
     // RFC2616 10.3.5
     // Update cached headers from the 304 response
     const HTTPHeaderMap& newHeaders = validatingResponse.httpHeaderFields();
-    HTTPHeaderMap::const_iterator end = newHeaders.end();
-    for (HTTPHeaderMap::const_iterator it = newHeaders.begin(); it != end; ++it) {
+    for (const auto& header : newHeaders) {
         // Entity headers should not be sent by servers when generating a 304
         // response; misconfigured servers send them anyway. We shouldn't allow
         // such headers to update the original request. We'll base this on the
         // list defined by RFC2616 7.1, with a few additions for extension headers
         // we care about.
-        if (!shouldUpdateHeaderAfterRevalidation(it->key))
+        if (!shouldUpdateHeaderAfterRevalidation(header.key))
             continue;
-        m_response.setHTTPHeaderField(it->key, it->value);
+        m_response.setHTTPHeaderField(header.key, header.value);
     }
 }
 
@@ -812,10 +805,10 @@ void Resource::unregisterHandle(ResourcePtrBase* h)
 
 bool Resource::canReuseRedirectChain()
 {
-    for (size_t i = 0; i < m_redirectChain.size(); ++i) {
-        if (!canUseResponse(m_redirectChain[i].m_redirectResponse, m_responseTimestamp))
+    for (auto& redirect : m_redirectChain) {
+        if (!canUseResponse(redirect.m_redirectResponse, m_responseTimestamp))
             return false;
-        if (m_redirectChain[i].m_request.cacheControlContainsNoCache() || m_redirectChain[i].m_request.cacheControlContainsNoStore())
+        if (redirect.m_request.cacheControlContainsNoCache() || redirect.m_request.cacheControlContainsNoStore())
             return false;
     }
     return true;
@@ -913,20 +906,19 @@ bool Resource::ResourceCallback::isScheduled(Resource* resource) const
 
 void Resource::ResourceCallback::timerFired(Timer<ResourceCallback>*)
 {
-    HashSet<Resource*>::iterator end = m_resourcesWithPendingClients.end();
-    Vector<ResourcePtr<Resource> > resources;
-    for (HashSet<Resource*>::iterator it = m_resourcesWithPendingClients.begin(); it != end; ++it)
-        resources.append(*it);
+    Vector<ResourcePtr<Resource>> resources;
+    for (const auto& resource : m_resourcesWithPendingClients)
+        resources.append(resource);
     m_resourcesWithPendingClients.clear();
 
-    for (size_t i = 0; i < resources.size(); i++) {
-        resources[i]->assertAlive();
-        resources[i]->finishPendingClients();
-        resources[i]->assertAlive();
+    for (const auto& resource : resources) {
+        resource->assertAlive();
+        resource->finishPendingClients();
+        resource->assertAlive();
     }
 
-    for (size_t i = 0; i < resources.size(); i++)
-        resources[i]->assertAlive();
+    for (const auto& resource : resources)
+        resource->assertAlive();
 }
 
 static const char* initatorTypeNameToString(const AtomicString& initiatorTypeName)