Simplify the user agent code some more since after r255534 it's not affected by the site's URL.

content/child/blink_platform_impl.cc

Index: content/child/blink_platform_impl.cc
===================================================================
--- content/child/blink_platform_impl.cc	(revision 255867)
+++ content/child/blink_platform_impl.cc	(working copy)
@@ -28,6 +28,7 @@
 #include "base/time/time.h"
 #include "content/child/web_socket_stream_handle_impl.h"
 #include "content/child/web_url_loader_impl.h"
+#include "content/public/common/content_client.h"
 #include "grit/blink_resources.h"
 #include "grit/webkit_resources.h"
 #include "grit/webkit_strings.h"
@@ -38,7 +39,6 @@
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "ui/base/layout.h"
 #include "webkit/child/webkit_child_helpers.h"
-#include "webkit/common/user_agent/user_agent.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/sys_utils.h"
@@ -362,8 +362,12 @@
   return new WebSocketStreamHandleImpl(this);
 }
 
+WebString BlinkPlatformImpl::userAgent() {
+  return WebString::fromUTF8(GetContentClient()->GetUserAgent());
+}
+
 WebString BlinkPlatformImpl::userAgent(const WebURL& url) {
-  return WebString::fromUTF8(webkit_glue::GetUserAgent(url));
+  return userAgent();
 }
 
 WebData BlinkPlatformImpl::parseDataURL(