Marshal 64 bit byte counts as double to the profiler.

chrome/browser/task_profiler/task_profiler_data_serializer_unittest.cc

 // Copyright (c) 2012 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/json/json_writer.h"
 #include "base/process/process_handle.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/tracked_objects.h"
@@ skipping 94 matching lines @@
                         "{"
                         "\"list\":[{"
                         "\"birth_location\":{"
                         "\"file_name\":\"path/to/foo.cc\","
                         "\"function_name\":\"WhizBang\","
                         "\"line_number\":101"
                         "},"
                         "\"birth_thread\":\"CrBrowserMain\","
                         "\"death_data\":{"
                         "\"alloc_ops\":127,"
-                        "\"alloc_overhead_bytes\":201,"
-                        "\"allocated_bytes\":2013,"
+                        "\"alloc_overhead_bytes\":201.0,"
+                        "\"allocated_bytes\":2013.0,"
                         "\"count\":37,"
                         "\"free_ops\":120,"
-                        "\"freed_bytes\":1092,"
+                        "\"freed_bytes\":1092.0,"
                         "\"max_allocated_bytes\":1500,"
                         "\"queue_ms\":79,"
                         "\"queue_ms_max\":53,"
                         "\"queue_ms_sample\":13,"
                         "\"run_ms\":17,"
                         "\"run_ms_max\":5,"
                         "\"run_ms_sample\":3"
                         "},"
                         "\"death_thread\":\"WorkerPool/-1340960768\""
                         "},{"
                         "\"birth_location\":{"
                         "\"file_name\":\"path/to/bar.cc\","
                         "\"function_name\":\"FizzBoom\","
                         "\"line_number\":433"
                         "},"
                         "\"birth_thread\":\"Chrome_IOThread\","
                         "\"death_data\":{"
                         "\"alloc_ops\":1207,"
-                        "\"alloc_overhead_bytes\":2001,"
-                        "\"allocated_bytes\":20013,"
+                        "\"alloc_overhead_bytes\":2001.0,"
+                        "\"allocated_bytes\":20013.0,"
                         "\"count\":41,"
                         "\"free_ops\":1200,"
-                        "\"freed_bytes\":10092,"
+                        "\"freed_bytes\":10092.0,"
                         "\"max_allocated_bytes\":15000,"
                         "\"queue_ms\":2079,"
                         "\"queue_ms_max\":2053,"
                         "\"queue_ms_sample\":2013,"
                         "\"run_ms\":2017,"
                         "\"run_ms_max\":205,"
                         "\"run_ms_sample\":203"
                         "},"
                         "\"death_thread\":\"PAC thread #3\""
                         "}],"
                         "\"process_id\":239,"
                         "\"process_type\":\"Tab\""
                         "}");
   }
 }