Componentize renderer side of DNS prefetching.

chrome/renderer/chrome_content_renderer_client.h

Index: chrome/renderer/chrome_content_renderer_client.h
diff --git a/chrome/renderer/chrome_content_renderer_client.h b/chrome/renderer/chrome_content_renderer_client.h
index e28b9ebf7ab48f34bca5d1223f407d6d5edae4fa..c28c5aa53312774fe9ff0fe0f5a49939be326325 100644
--- a/chrome/renderer/chrome_content_renderer_client.h
+++ b/chrome/renderer/chrome_content_renderer_client.h
@@ -21,7 +21,6 @@ class ChromeRenderProcessObserver;
 class ChromePDFPrintClient;
 #endif
 class PrescientNetworkingDispatcher;
-class RendererNetPredictor;
 class SearchBouncer;
 #if defined(ENABLE_SPELLCHECK)
 class SpellCheck;
@@ -42,6 +41,10 @@ class ExtensionSet;
 class RendererPermissionsPolicyDelegate;
 }
 
+namespace predictor {
+class RendererNetPredictor;
+}
+
 namespace prerender {
 class PrerenderDispatcher;
 }
@@ -214,7 +217,7 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
 #endif
 
   scoped_ptr<PrescientNetworkingDispatcher> prescient_networking_dispatcher_;
-  scoped_ptr<RendererNetPredictor> net_predictor_;
+  scoped_ptr<predictor::RendererNetPredictor> net_predictor_;
   scoped_ptr<password_manager::CredentialManagerClient>
       credential_manager_client_;
 #if defined(ENABLE_SPELLCHECK)