Add QuicStrCat.

net/tools/quic/quic_http_response_cache_test.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/memory/singleton.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
@@ skipping 161 matching lines @@
   string request_host = "www.foo.com";
   string response_body("hello response");
   const size_t kNumResources = 5;
   int NumResources = 5;
   std::list<QuicHttpResponseCache::ServerPushInfo> push_resources;
   string scheme = "http";
   for (int i = 0; i < NumResources; ++i) {
     string path = "/server_push_src" + base::IntToString(i);
     string url = scheme + "://" + request_host + path;
     GURL resource_url(url);
-    string body = "This is server push response body for " + path;
+    string body = QuicStrCat("This is server push response body for ", path);
     SpdyHeaderBlock response_headers;
     response_headers[":version"] = "HTTP/1.1";
     response_headers[":status"] = "200";
     response_headers["content-length"] = base::UintToString(body.size());
     push_resources.push_back(
         ServerPushInfo(resource_url, response_headers.Clone(), i, body));
   }
 
   cache_.AddSimpleResponseWithServerPushResources(
       request_host, "/", 200, response_body, push_resources);
@@ skipping 46 matching lines @@
     ASSERT_TRUE(ContainsKey(response->headers(), ":status"));
     EXPECT_EQ(push_response_status[i++],
               response->headers().find(":status")->second);
     EXPECT_EQ(push_resource.body, response->body());
     resources.pop_front();
   }
 }
 
 }  // namespace test
 }  // namespace net