Prepare blink to unify definitions of load completion

Source/core/fetch/Resource.h

Index: Source/core/fetch/Resource.h
diff --git a/Source/core/fetch/Resource.h b/Source/core/fetch/Resource.h
index 5434fba7a36338411102497995c75d0b60024c4f..8ea4c5c42706034d3f3d84cb6d3d904abe7207dd 100644
--- a/Source/core/fetch/Resource.h
+++ b/Source/core/fetch/Resource.h
@@ -176,7 +176,8 @@ public:
 
     // Computes the status of an object after loading.
     // Updates the expire date on the cache entry file
-    void finish(double finishTime = 0.0);
+    void setLoadFinishTime(double finishTime) { m_loadFinishTime = finishTime; }

[Nate Chapin, 2014/09/15 23:39:34]

Split these out to guarantee we set timing information before test completion
(hopefully this can eventually get re-simplified).

+    void finish();
 
     // FIXME: Remove the stringless variant once all the callsites' error messages are updated.
     bool passesAccessControlCheck(SecurityOrigin*);