Extract WebFrameClient implementation out of WebTestProxyBase.

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 ce6cc8785a322d5cc466ad781ae88bac2a0e712a..7875804246c9e7fafdfb919e0e10f91398582a0c 100644
--- a/components/test_runner/web_test_interfaces.cc
+++ b/components/test_runner/web_test_interfaces.cc
@@ -14,6 +14,7 @@
 #include "components/test_runner/mock_webrtc_peer_connection_handler.h"
 #include "components/test_runner/test_interfaces.h"
 #include "components/test_runner/test_runner.h"
+#include "components/test_runner/web_frame_test_client.h"
 
 using namespace blink;
 
@@ -97,4 +98,15 @@ AppBannerClient* WebTestInterfaces::GetAppBannerClient() {
   return interfaces_->GetAppBannerClient();
 }
 
+blink::WebFrameClient* WebTestInterfaces::GetWebFrameTestClient() {
+  if (!web_frame_test_client_) {
+    web_frame_test_client_.reset(new WebFrameTestClient(
+        interfaces_->GetTestRunner(),
+        interfaces_->GetDelegate(),
+        interfaces_->GetAccessibilityController(),
+        interfaces_->GetEventSender()));
+  }
+  return web_frame_test_client_.get();
+}
+
 }  // namespace test_runner