Why this CL triggers an OilPan crash.

third_party/WebKit/Source/web/WebViewImpl.h

Index: third_party/WebKit/Source/web/WebViewImpl.h
diff --git a/third_party/WebKit/Source/web/WebViewImpl.h b/third_party/WebKit/Source/web/WebViewImpl.h
index 5718d39d8faf2c5858411f133b6b3e8aebd44b43..530892024f7d583b3dd3f2283fb54b1a2aae65a3 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.h
+++ b/third_party/WebKit/Source/web/WebViewImpl.h
@@ -101,7 +101,9 @@ class WEB_EXPORT WebViewImpl final
       public WebScheduler::InterventionReporter,
       public WebViewScheduler::WebViewSchedulerSettings {
  public:
-  static WebViewBase* Create(WebViewClient*, WebPageVisibilityState);
+  static WebViewBase* Create(WebViewClient*,
+                             WebPageVisibilityState,
+                             int browsing_instance_id);
 
   // WebWidget methods:
   void Close() override;
@@ -541,7 +543,9 @@ class WEB_EXPORT WebViewImpl final
   friend class WebViewFrameWidget;
   friend class WTF::RefCounted<WebViewImpl>;
 
-  explicit WebViewImpl(WebViewClient*, WebPageVisibilityState);
+  explicit WebViewImpl(WebViewClient*,
+                       WebPageVisibilityState,
+                       int browsing_instance_id);
   ~WebViewImpl() override;
 
   void HideSelectPopup();