Order function definitions in base/ according to the header.

base/file_util.cc

Index: base/file_util.cc
diff --git a/base/file_util.cc b/base/file_util.cc
index d1a46c92fbca89651dfe244462289c28cc3dc5c8..c9661e714d2ffcfdb0fccd56b56e7e9488b08e69 100644
--- a/base/file_util.cc
+++ b/base/file_util.cc
@@ -315,13 +315,11 @@ MemoryMappedFile::~MemoryMappedFile() {
   CloseHandles();
 }
 
-bool MemoryMappedFile::Initialize(base::PlatformFile file) {
+bool MemoryMappedFile::Initialize(const FilePath& file_name) {
   if (IsValid())
     return false;
 
-  file_ = file;
-
-  if (!MapFileToMemoryInternal()) {
+  if (!MapFileToMemory(file_name)) {
     CloseHandles();
     return false;
   }
@@ -329,11 +327,13 @@ bool MemoryMappedFile::Initialize(base::PlatformFile file) {
   return true;
 }
 
-bool MemoryMappedFile::Initialize(const FilePath& file_name) {
+bool MemoryMappedFile::Initialize(base::PlatformFile file) {
   if (IsValid())
     return false;
 
-  if (!MapFileToMemory(file_name)) {
+  file_ = file;
+
+  if (!MapFileToMemoryInternal()) {
     CloseHandles();
     return false;
   }
@@ -341,6 +341,10 @@ bool MemoryMappedFile::Initialize(const FilePath& file_name) {
   return true;
 }
 
+bool MemoryMappedFile::IsValid() {
+  return data_ != NULL;
+}
+
 bool MemoryMappedFile::MapFileToMemory(const FilePath& file_name) {
   file_ = base::CreatePlatformFile(
       file_name, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
@@ -354,10 +358,6 @@ bool MemoryMappedFile::MapFileToMemory(const FilePath& file_name) {
   return MapFileToMemoryInternal();
 }
 
-bool MemoryMappedFile::IsValid() {
-  return data_ != NULL;
-}
-
 // Deprecated functions ----------------------------------------------------
 
 #if defined(OS_WIN)