Reland "Prepare blink to unify definitions of load completion"

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 26d9dbd90cd1273af0075b867267004cc8dbaf65..afb09d439894e5af6c50f42021ea94693c2e8431 100644
--- a/Source/core/fetch/Resource.cpp
+++ b/Source/core/fetch/Resource.cpp
@@ -265,11 +265,10 @@ void Resource::finishOnePart()
     checkNotify();
 }
 
-void Resource::finish(double finishTime)
+void Resource::finish()
 {
     ASSERT(!m_resourceToRevalidate);
     ASSERT(!errorOccurred());
-    m_loadFinishTime = finishTime;
     finishOnePart();
     if (!errorOccurred())
         m_status = Cached;