Extract WebViewClient implementation out of WebTestProxyBase.

content/test/layouttest_support.cc

Index: content/test/layouttest_support.cc
diff --git a/content/test/layouttest_support.cc b/content/test/layouttest_support.cc
index 5157465a7c860c1ad7b338e098ef783308e72093..79e2b7ceb8938ad83ea86c369f7e761a9bc95f40 100644
--- a/content/test/layouttest_support.cc
+++ b/content/test/layouttest_support.cc
@@ -64,11 +64,14 @@ base::LazyInstance<ViewProxyCreationCallback>::Leaky
 base::LazyInstance<FrameProxyCreationCallback>::Leaky
     g_frame_test_proxy_callback = LAZY_INSTANCE_INITIALIZER;
 
+using WebTestProxyType = test_runner::WebTestProxy<RenderViewImpl,
+                                                   CompositorDependencies*,
+                                                   const ViewMsg_New_Params&>;
+
 RenderViewImpl* CreateWebTestProxy(CompositorDependencies* compositor_deps,
                                    const ViewMsg_New_Params& params) {
-  typedef test_runner::WebTestProxy<RenderViewImpl, CompositorDependencies*,
-                                    const ViewMsg_New_Params&> ProxyType;
-  ProxyType* render_view_proxy = new ProxyType(compositor_deps, params);
+  WebTestProxyType* render_view_proxy =
+      new WebTestProxyType(compositor_deps, params);
   if (g_view_test_proxy_callback == 0)
     return render_view_proxy;
   g_view_test_proxy_callback.Get().Run(render_view_proxy, render_view_proxy);
@@ -103,6 +106,12 @@ void RegisterSideloadedTypefaces(SkFontMgr* fontmgr) {
 
 }  // namespace
 
+test_runner::WebTestProxyBase* GetWebTestProxyBase(RenderView* render_view) {
+  WebTestProxyType* render_view_proxy =
+      static_cast<WebTestProxyType*>(render_view);
+  return static_cast<test_runner::WebTestProxyBase*>(render_view_proxy);
+}
+
 void EnableWebTestProxyCreation(
     const ViewProxyCreationCallback& view_proxy_creation_callback,
     const FrameProxyCreationCallback& frame_proxy_creation_callback) {