First step to remove SingleRequestHostResolver.

content/browser/renderer_host/pepper/pepper_lookup_request.h

Index: content/browser/renderer_host/pepper/pepper_lookup_request.h
diff --git a/content/browser/renderer_host/pepper/pepper_lookup_request.h b/content/browser/renderer_host/pepper/pepper_lookup_request.h
index 82f3c6800f58c35219cb7eb14f2f11fc9022cf02..14ae686b052b801e0b4c58f860ebd018cda2701a 100644
--- a/content/browser/renderer_host/pepper/pepper_lookup_request.h
+++ b/content/browser/renderer_host/pepper/pepper_lookup_request.h
@@ -12,7 +12,6 @@
 #include "net/base/address_list.h"
 #include "net/base/net_errors.h"
 #include "net/dns/host_resolver.h"
-#include "net/dns/single_request_host_resolver.h"
 
 namespace content {
 
@@ -37,12 +36,10 @@ class PepperLookupRequest {
 
   void Start() {
     int result =
-        resolver_.Resolve(request_info_,
-                          priority_,
-                          &addresses_,
-                          base::Bind(&PepperLookupRequest<T>::OnLookupFinished,
-                                     base::Unretained(this)),
-                          net::BoundNetLog());
+        resolver_->Resolve(request_info_, priority_, &addresses_,
+                           base::Bind(&PepperLookupRequest<T>::OnLookupFinished,
+                                      base::Unretained(this)),
+                           &request_, net::BoundNetLog());
     if (result != net::ERR_IO_PENDING)
       OnLookupFinished(result);
   }
@@ -53,7 +50,8 @@ class PepperLookupRequest {
     delete this;
   }
 
-  net::SingleRequestHostResolver resolver_;
+  net::HostResolver* resolver_;
+  std::unique_ptr<net::HostResolver::Request> request_;
   net::HostResolver::RequestInfo request_info_;
   net::RequestPriority priority_;
   std::unique_ptr<T> bound_info_;