Do not store TestRunner in WebFrameTestClient.

components/test_runner/web_test_interfaces.cc

Index: components/test_runner/web_test_interfaces.cc
diff --git a/components/test_runner/web_test_interfaces.cc b/components/test_runner/web_test_interfaces.cc
index 184032205eb0c3199b034b226e15ec784cc3542c..6f87eb64971e00803d3db20eff37ef6d19791ef2 100644
--- a/components/test_runner/web_test_interfaces.cc
+++ b/components/test_runner/web_test_interfaces.cc
@@ -93,15 +93,16 @@ WebTestInterfaces::CreateAppBannerClient() {
 std::unique_ptr<WebFrameTestClient> WebTestInterfaces::CreateWebFrameTestClient(
     WebViewTestProxyBase* web_view_test_proxy_base,
     WebFrameTestProxyBase* web_frame_test_proxy_base) {
-  return base::MakeUnique<WebFrameTestClient>(
-      interfaces_->GetTestRunner(), interfaces_->GetDelegate(),
-      web_view_test_proxy_base, web_frame_test_proxy_base);
+  // TODO(lukasza): Do not pass the WebTestDelegate below - it's lifetime can
+  // differ from the lifetime of WebFrameTestClient - https://crbug.com/606594.
+  return base::MakeUnique<WebFrameTestClient>(interfaces_->GetDelegate(),
+                                              web_view_test_proxy_base,
+                                              web_frame_test_proxy_base);
 }
 
 std::unique_ptr<WebViewTestClient> WebTestInterfaces::CreateWebViewTestClient(
     WebViewTestProxyBase* web_view_test_proxy_base) {
-  return base::MakeUnique<WebViewTestClient>(interfaces_->GetTestRunner(),
-                                             web_view_test_proxy_base);
+  return base::MakeUnique<WebViewTestClient>(web_view_test_proxy_base);
 }
 
 std::unique_ptr<WebWidgetTestClient>