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 ac69cadd88027e9889082567a271aeb285784b1a..7a476c1acc62ae84a27767dd0127c5449e1a63c5 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;
@@ -35,6 +34,10 @@ class BrowserPluginDelegate;
 struct WebPluginInfo;
 }
 
+namespace dns_prefetch {
+class RendererNetPredictor;
+}
+
 namespace extensions {
 class Dispatcher;
 class Extension;
@@ -219,7 +222,7 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
 #endif
 
   scoped_ptr<PrescientNetworkingDispatcher> prescient_networking_dispatcher_;
-  scoped_ptr<RendererNetPredictor> net_predictor_;
+  scoped_ptr<dns_prefetch::RendererNetPredictor> net_predictor_;
   scoped_ptr<password_manager::CredentialManagerClient>
       credential_manager_client_;
 #if defined(ENABLE_SPELLCHECK)