Switch to standard integer types in chrome/browser/, part 2 of 4.

chrome/browser/media_galleries/fileapi/media_file_system_backend.cc

Index: chrome/browser/media_galleries/fileapi/media_file_system_backend.cc
diff --git a/chrome/browser/media_galleries/fileapi/media_file_system_backend.cc b/chrome/browser/media_galleries/fileapi/media_file_system_backend.cc
index aa4f27d904fe50779c11ad140ff271e1de0aebba..bb2ee6112b8ec1580d5cca99fc8e1b0ac1120b55 100644
--- a/chrome/browser/media_galleries/fileapi/media_file_system_backend.cc
+++ b/chrome/browser/media_galleries/fileapi/media_file_system_backend.cc
@@ -16,6 +16,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/media_galleries/fileapi/device_media_async_file_util.h"
@@ -72,8 +73,8 @@ void OnPreferencesInit(
 }
 
 void AttemptAutoMountOnUIThread(
-    int32 process_id,
-    int32 routing_id,
+    int32_t process_id,
+    int32_t routing_id,
     const std::string& storage_domain,
     const std::string& mount_point,
     const base::Callback<void(base::File::Error result)>& callback) {
@@ -352,8 +353,8 @@ bool MediaFileSystemBackend::HasInplaceCopyImplementation(
 scoped_ptr<storage::FileStreamReader>
 MediaFileSystemBackend::CreateFileStreamReader(
     const FileSystemURL& url,
-    int64 offset,
-    int64 max_bytes_to_read,
+    int64_t offset,
+    int64_t max_bytes_to_read,
     const base::Time& expected_modification_time,
     FileSystemContext* context) const {
   if (url.type() == storage::kFileSystemTypeDeviceMedia) {
@@ -376,7 +377,7 @@ MediaFileSystemBackend::CreateFileStreamReader(
 scoped_ptr<storage::FileStreamWriter>
 MediaFileSystemBackend::CreateFileStreamWriter(
     const FileSystemURL& url,
-    int64 offset,
+    int64_t offset,
     FileSystemContext* context) const {
   return scoped_ptr<storage::FileStreamWriter>(
       storage::FileStreamWriter::CreateForLocalFile(