Merge WebKit at r60074: Initial merge by git

Change-Id: I18a2dc5439e36c928351ea829d8fb4e39b062fc7

1 files changed, 11 insertions, 4 deletions

diff --git a/WebCore/loader/DocLoader.cpp b/WebCore/loader/DocLoader.cpp
index 6a0b3d1..c0ba2f3 100644
--- a/WebCore/loader/DocLoader.cpp
+++ b/WebCore/loader/DocLoader.cpp
@@ -477,10 +477,14 @@ void DocLoader::requestPreload(CachedResource::Type type, const String& url, con
         encoding = charset.isEmpty() ? m_doc->frame()->loader()->writer()->encoding() : charset;
 
     CachedResource* resource = requestResource(type, url, encoding, true);
-    if (!resource || m_preloads.contains(resource))
+    if (!resource || (m_preloads && m_preloads->contains(resource)))
         return;
     resource->increasePreloadCount();
-    m_preloads.add(resource);
+
+    if (!m_preloads)
+        m_preloads.set(new ListHashSet<CachedResource*>);
+    m_preloads->add(resource);
+
 #if PRELOAD_DEBUG
     printf("PRELOADING %s\n",  resource->url().latin1().data());
 #endif
@@ -491,8 +495,11 @@ void DocLoader::clearPreloads()
 #if PRELOAD_DEBUG
     printPreloadStats();
 #endif
-    ListHashSet<CachedResource*>::iterator end = m_preloads.end();
-    for (ListHashSet<CachedResource*>::iterator it = m_preloads.begin(); it != end; ++it) {
+    if (!m_preloads)
+        return;
+
+    ListHashSet<CachedResource*>::iterator end = m_preloads->end();
+    for (ListHashSet<CachedResource*>::iterator it = m_preloads->begin(); it != end; ++it) {
         CachedResource* res = *it;
         res->decreasePreloadCount();
         if (res->canDelete() && !res->inCache())