Convert Pass()→std::move() in mojo/

mojo/fetcher/local_fetcher.cc

Index: mojo/fetcher/local_fetcher.cc
diff --git a/mojo/fetcher/local_fetcher.cc b/mojo/fetcher/local_fetcher.cc
index 1bce4a545689213c30b13eee6c8302354ea411e6..e723eca6591700439c7157d4ed4e736e3abc6be5 100644
--- a/mojo/fetcher/local_fetcher.cc
+++ b/mojo/fetcher/local_fetcher.cc
@@ -4,6 +4,8 @@
 
 #include "mojo/fetcher/local_fetcher.h"
 
+#include <utility>
+
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ -101,19 +103,19 @@ URLResponsePtr LocalFetcher::AsURLResponse(base::TaskRunner* task_runner,
   URLResponsePtr response(URLResponse::New());
   response->url = String::From(url_);
   DataPipe data_pipe;
-  response->body = data_pipe.consumer_handle.Pass();
+  response->body = std::move(data_pipe.consumer_handle);
   int64 file_size;
   if (base::GetFileSize(path_, &file_size)) {
     response->headers = Array<HttpHeaderPtr>(1);
     HttpHeaderPtr header = HttpHeader::New();
     header->name = "Content-Length";
     header->value = base::StringPrintf("%" PRId64, file_size);
-    response->headers[0] = header.Pass();
+    response->headers[0] = std::move(header);
   }
   response->mime_type = String::From(MimeType());
-  common::CopyFromFile(path_, data_pipe.producer_handle.Pass(), skip,
+  common::CopyFromFile(path_, std::move(data_pipe.producer_handle), skip,
                        task_runner, base::Bind(&IgnoreResult));
-  return response.Pass();
+  return response;
 }
 
 void LocalFetcher::AsPath(