Bring RFH/RVH unit tests closer to reality of how RF/RV are initialized

content/public/test/test_renderer_host.h

Index: content/public/test/test_renderer_host.h
diff --git a/content/public/test/test_renderer_host.h b/content/public/test/test_renderer_host.h
index 001a48e00b1144ce2410b94edca315430a358c0d..9945d8719efeb0313d34cb828a78a97acaa288bc 100644
--- a/content/public/test/test_renderer_host.h
+++ b/content/public/test/test_renderer_host.h
@@ -66,6 +66,11 @@ class RenderFrameHostTester {
 
   virtual ~RenderFrameHostTester() {}
 
+  // Simulates initialization of the RenderFrame object in the renderer process
+  // and ensures internal state of RenderFrameHost is ready for simulating
+  // RenderFrame originated IPCs.
+  virtual void InitializeRenderFrameIfNeeded() = 0;
+
   // Gives tests access to RenderFrameHostImpl::OnCreateChild. The returned
   // RenderFrameHost is owned by the parent RenderFrameHost.
   virtual RenderFrameHost* AppendChild(const std::string& frame_name) = 0;