Remove navigation from TestRenderViewHost

content/test/test_render_frame_host.cc

Index: content/test/test_render_frame_host.cc
diff --git a/content/test/test_render_frame_host.cc b/content/test/test_render_frame_host.cc
index 8cfc8f57e38d7134dcde088ac3d92ee3b1f45337..598ee5d0605025e5ac9d494d88a5d0eae1da6bca 100644
--- a/content/test/test_render_frame_host.cc
+++ b/content/test/test_render_frame_host.cc
@@ -42,11 +42,6 @@ TestRenderFrameHost::TestRenderFrameHost(RenderViewHostImpl* render_view_host,
       child_creation_observer_(delegate ? delegate->GetAsWebContents() : NULL),
       contents_mime_type_("text/html"),
       simulate_history_list_was_cleared_(false) {
-  // Allow TestRenderViewHosts to easily access their main frame RFH.
-  if (frame_tree_node == frame_tree->root()) {
-    static_cast<TestRenderViewHost*>(render_view_host)->
-        set_main_render_frame_host(this);
-  }
 }
 
 TestRenderFrameHost::~TestRenderFrameHost() {}
@@ -70,6 +65,10 @@ void TestRenderFrameHost::SendNavigateWithTransition(
   SendNavigateWithTransitionAndResponseCode(page_id, url, transition, 200);
 }
 
+void TestRenderFrameHost::SetContentsMimeType(const std::string& mime_type) {
+  contents_mime_type_ = mime_type;
+}
+
 void TestRenderFrameHost::SendBeforeUnloadACK(bool proceed) {
   base::TimeTicks now = base::TimeTicks::Now();
   OnBeforeUnloadACK(proceed, now, now);