Convert the pp::proxy namespace to the ppapi::proxy namespace.

ppapi/proxy/ppb_url_request_info_proxy.cc

Index: ppapi/proxy/ppb_url_request_info_proxy.cc
diff --git a/ppapi/proxy/ppb_url_request_info_proxy.cc b/ppapi/proxy/ppb_url_request_info_proxy.cc
index 7b4152af502486bf98f72dcc3bffd3ecf824e92c..cf9dd3d33104cf51f3a886da95eb04dc5d6a433f 100644
--- a/ppapi/proxy/ppb_url_request_info_proxy.cc
+++ b/ppapi/proxy/ppb_url_request_info_proxy.cc
@@ -12,13 +12,11 @@
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
 
-using ppapi::HostResource;
-using ppapi::Resource;
 using ppapi::thunk::EnterFunctionNoLock;
 using ppapi::thunk::PPB_URLRequestInfo_API;
 using ppapi::thunk::ResourceCreationAPI;
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
@@ -122,7 +120,7 @@ PPB_URLRequestInfo_Proxy::~PPB_URLRequestInfo_Proxy() {
 // static
 const InterfaceProxy::Info* PPB_URLRequestInfo_Proxy::GetInfo() {
   static const Info info = {
-    ::ppapi::thunk::GetPPB_URLRequestInfo_Thunk(),
+    thunk::GetPPB_URLRequestInfo_Thunk(),
     PPB_URLREQUESTINFO_INTERFACE,
     INTERFACE_ID_PPB_URL_REQUEST_INFO,
     false,
@@ -206,4 +204,4 @@ void PPB_URLRequestInfo_Proxy::OnMsgAppendFileToBody(
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi