Fix Resource Priorities and Scheduling (Blink Side)

Source/core/fetch/ResourceLoadPriorityOptimizer.cpp

Index: Source/core/fetch/ResourceLoadPriorityOptimizer.cpp
diff --git a/Source/core/fetch/ResourceLoadPriorityOptimizer.cpp b/Source/core/fetch/ResourceLoadPriorityOptimizer.cpp
index 721386ed1f684e72d47d52ed423ce3482c1c7656..f32557e95a76833996d92927475912d51da1a123 100644
--- a/Source/core/fetch/ResourceLoadPriorityOptimizer.cpp
+++ b/Source/core/fetch/ResourceLoadPriorityOptimizer.cpp
@@ -30,6 +30,7 @@
 
 #include "config.h"
 #include "core/fetch/ResourceLoadPriorityOptimizer.h"
+#include "core/frame/Settings.h"
 #include "core/layout/LayoutObject.h"
 #include "platform/TraceEvent.h"
 
@@ -55,6 +56,7 @@ ResourceLoadPriorityOptimizer::ResourceAndVisibility::~ResourceAndVisibility()
 }
 
 ResourceLoadPriorityOptimizer::ResourceLoadPriorityOptimizer()
+    : m_fetchMode(-1)
 {
 }
 
@@ -64,6 +66,9 @@ ResourceLoadPriorityOptimizer::~ResourceLoadPriorityOptimizer()
 
 void ResourceLoadPriorityOptimizer::addLayoutObject(LayoutObject* layoutObject)
 {
+    if (m_fetchMode < 0 && layoutObject && layoutObject->document().settings()) {
+        m_fetchMode = layoutObject->document().settings()->resourceFetchMode();
+    }
     m_objects.add(layoutObject);
     layoutObject->setHasPendingResourceUpdate(true);
 }
@@ -98,6 +103,11 @@ void ResourceLoadPriorityOptimizer::updateImageResourcesWithLoadPriority()
         ResourceLoadPriority priority = resource.value->status == Visible ?
             ResourceLoadPriorityLow : ResourceLoadPriorityVeryLow;
 
+        if (m_fetchMode == 2) {
+            priority = resource.value->status == Visible ?
+                ResourceLoadPriorityHigh : ResourceLoadPriorityLow;
+        }
+
         if (priority != resource.value->imageResource->resourceRequest().priority()) {
             resource.value->imageResource->mutableResourceRequest().setPriority(priority, resource.value->screenArea);
             resource.value->imageResource->didChangePriority(priority, resource.value->screenArea);