Provide an overload to WebView::create that does not require a WebViewClient.

third_party/WebKit/public/web/WebView.h

Index: third_party/WebKit/public/web/WebView.h
diff --git a/third_party/WebKit/public/web/WebView.h b/third_party/WebKit/public/web/WebView.h
index 92bdf0736773c4ba96a72dbbc33fd146b0f7b557..1b737291a8b6e789f08f44422d9c7587fe131d07 100644
--- a/third_party/WebKit/public/web/WebView.h
+++ b/third_party/WebKit/public/web/WebView.h
@@ -119,9 +119,15 @@ class WebView : protected WebWidget {
   // Initialization ------------------------------------------------------
 
   // Creates a WebView that is NOT yet initialized. You will need to
-  // call setMainFrame to finish the initialization. It is valid
-  // to pass a null client pointer. The WebPageVisibilityState defines the
-  // initial visibility of the page.
+  // call setMainFrame to finish the initialization. Use this factory method
+  // if you do not want to specify a client for callback notifications. The
+  // WebPageVisibilityState defines the initial visibility of the page.
+  BLINK_EXPORT static WebView* create(WebPageVisibilityState);
+
+  // Creates a WebView that is NOT yet initialized. You will need to
+  // call setMainFrame to finish the initialization. A valid WebViewClient must
+  // be supplied. The WebPageVisibilityState defines the initial visibility of
+  // the page.
   BLINK_EXPORT static WebView* create(WebViewClient*, WebPageVisibilityState);
 
   // After creating a WebView, you should immediately call this method.