Refactor the API for setting dynamic resource load priorities

third_party/WebKit/Source/core/fetch/Resource.cpp

Index: third_party/WebKit/Source/core/fetch/Resource.cpp
diff --git a/third_party/WebKit/Source/core/fetch/Resource.cpp b/third_party/WebKit/Source/core/fetch/Resource.cpp
index f54a0dc0d5b9c056c4624bbdcd83fabb292eb042..5c9e26944e13937b88c2a44d25fefd9a9caf3a04 100644
--- a/third_party/WebKit/Source/core/fetch/Resource.cpp
+++ b/third_party/WebKit/Source/core/fetch/Resource.cpp
@@ -941,10 +941,25 @@ size_t Resource::overheadSize() const
 
 void Resource::didChangePriority(ResourceLoadPriority loadPriority, int intraPriorityValue)
 {
+    m_resourceRequest.setPriority(loadPriority, intraPriorityValue);
     if (m_loader)
         m_loader->didChangePriority(loadPriority, intraPriorityValue);
 }
 
+ResourcePriority Resource::priorityFromClients()
+{
+    ResourcePriority priority;
+    ResourceClientWalker<ResourceClient> walker(m_clients);
+    while (ResourceClient* c = walker.next()) {
+        ResourcePriority nextPriority = c->computeResourcePriority();
+        if (nextPriority.visibility == ResourcePriority::NotVisible)
+            continue;
+        priority.visibility = ResourcePriority::Visible;
+        priority.intraPriorityValue += nextPriority.intraPriorityValue;
+    }
+    return priority;
+}
+
 Resource::ResourceCallback* Resource::ResourceCallback::callbackHandler()
 {
     DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ResourceCallback>, callbackHandler, (adoptPtrWillBeNoop(new ResourceCallback)));