Re-fix http://crbug.com/87176, and add a test.

content/test/test_web_contents_view.cc

Index: content/test/test_web_contents_view.cc
diff --git a/content/test/test_web_contents_view.cc b/content/test/test_web_contents_view.cc
index 49250b0c8b9c59d7c258628d8517fd6ca4a6e1fa..3443d0024d4794200343d02f28245b3bb5bf776f 100644
--- a/content/test/test_web_contents_view.cc
+++ b/content/test/test_web_contents_view.cc
@@ -4,6 +4,8 @@
 
 #include "content/test/test_web_contents_view.h"
 
+#include "content/browser/renderer_host/test_render_view_host.h"
+
 namespace content {
 
 TestWebContentsView::TestWebContentsView() {
@@ -95,12 +97,12 @@ void TestWebContentsView::CreateView(const gfx::Size& initial_size,
 
 RenderWidgetHostView* TestWebContentsView::CreateViewForWidget(
     RenderWidgetHost* render_widget_host) {
-  return NULL;
+  return new TestRenderWidgetHostView(render_widget_host);
 }
 
 RenderWidgetHostView* TestWebContentsView::CreateViewForPopupWidget(
     RenderWidgetHost* render_widget_host) {
-  return NULL;
+  return new TestRenderWidgetHostView(render_widget_host);
 }
 
 void TestWebContentsView::SetPageTitle(const string16& title) {