Convert visitedlink to use mojo.

android_webview/renderer/aw_content_renderer_client.cc

Index: android_webview/renderer/aw_content_renderer_client.cc
diff --git a/android_webview/renderer/aw_content_renderer_client.cc b/android_webview/renderer/aw_content_renderer_client.cc
index 5a7b385b6695e3b01c41e715596e3dc39348e1ab..830661ec87d306b34945682d78d52e861ead09da 100644
--- a/android_webview/renderer/aw_content_renderer_client.cc
+++ b/android_webview/renderer/aw_content_renderer_client.cc
@@ -40,6 +40,7 @@
 #include "net/base/escape.h"
 #include "net/base/net_errors.h"
 #include "services/shell/public/cpp/interface_provider.h"
+#include "services/shell/public/cpp/interface_registry.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
@@ -71,7 +72,9 @@ void AwContentRendererClient::RenderThreadStarted() {
   thread->AddObserver(aw_render_thread_observer_.get());
 
   visited_link_slave_.reset(new visitedlink::VisitedLinkSlave);
-  thread->AddObserver(visited_link_slave_.get());
+  thread->GetInterfaceRegistry()->AddInterface(
+      base::Bind(&visitedlink::VisitedLinkSlave::Bind,
+                 base::Unretained(visited_link_slave_.get())));
 
   blink::WebString content_scheme(base::ASCIIToUTF16(url::kContentScheme));
   blink::WebSecurityPolicy::registerURLSchemeAsLocal(content_scheme);