Allow navigations to frames that aren't being unloaded in the unload handler.

third_party/WebKit/Source/core/loader/NavigationScheduler.h

Index: third_party/WebKit/Source/core/loader/NavigationScheduler.h
diff --git a/third_party/WebKit/Source/core/loader/NavigationScheduler.h b/third_party/WebKit/Source/core/loader/NavigationScheduler.h
index b6ac577ef29e1910bd273b513f874287048c0a8a..38c930a7b923da8027c74e5b06021bed80d236c9 100644
--- a/third_party/WebKit/Source/core/loader/NavigationScheduler.h
+++ b/third_party/WebKit/Source/core/loader/NavigationScheduler.h
@@ -96,13 +96,13 @@ class CORE_EXPORT NavigationScheduler final
   WebScheduler::NavigatingFrameType m_frameType;
 };
 
-class NavigationDisablerForUnload {
-  WTF_MAKE_NONCOPYABLE(NavigationDisablerForUnload);
+class NavigationDisablerForBeforeUnload {
+  WTF_MAKE_NONCOPYABLE(NavigationDisablerForBeforeUnload);
   STACK_ALLOCATED();
 
  public:
-  NavigationDisablerForUnload() { s_navigationDisableCount++; }
-  ~NavigationDisablerForUnload() {
+  NavigationDisablerForBeforeUnload() { s_navigationDisableCount++; }
+  ~NavigationDisablerForBeforeUnload() {
     DCHECK(s_navigationDisableCount);
     s_navigationDisableCount--;
   }