Remove file_util::kPathSeparator from posix.

base/file_util_win.cc

Index: base/file_util_win.cc
===================================================================
--- base/file_util_win.cc	(revision 6039)
+++ base/file_util_win.cc	(working copy)
@@ -19,7 +19,13 @@
 namespace file_util {
 
 const wchar_t kPathSeparator = L'\\';
+const wchar_t kExtensionSeparator = L'.';
 
+void PathComponents(const std::wstring& path,
+                    std::vector<std::wstring>* components) {
+  PathComponents(FilePath(path), components);
+}
+
 std::wstring GetDirectoryFromPath(const std::wstring& path) {
   wchar_t path_buffer[MAX_PATH];
   wchar_t* file_ptr = NULL;
@@ -40,7 +46,56 @@
   *path = FilePath(file_path_buf);
   return true;
 }
-  
+
+void InsertBeforeExtension(std::wstring* path, const std::wstring& suffix) {
+  DCHECK(path);
+
+  const std::wstring::size_type last_dot = path->rfind(kExtensionSeparator);
+  const std::wstring::size_type last_sep = path->rfind(kPathSeparator);
+
+  if (last_dot == std::wstring::npos ||
+      (last_sep != std::wstring::npos && last_dot < last_sep)) {
+    // The path looks something like "C:\pics.old\jojo" or "C:\pics\jojo".
+    // We should just append the suffix to the entire path.
+    path->append(suffix);
+    return;
+  }
+
+  path->insert(last_dot, suffix);
+}
+
+// Appends the extension to file adding a '.' if extension doesn't contain one.
+// This does nothing if extension is empty or '.'. This is used internally by
+// ReplaceExtension.
+static void AppendExtension(const std::wstring& extension,
+                            std::wstring* file) {
+  if (!extension.empty() && extension != L".") {
+    if (extension[0] != L'.')
+      file->append(L".");
+    file->append(extension);
+  }
+}
+
+void ReplaceExtension(std::wstring* file_name, const std::wstring& extension) {
+  const std::wstring::size_type last_dot = file_name->rfind(L'.');
+  if (last_dot == std::wstring::npos) {
+    // No extension, just append the supplied extension.
+    AppendExtension(extension, file_name);
+    return;
+  }
+  const std::wstring::size_type last_separator =
+      file_name->rfind(kPathSeparator);
+  if (last_separator != std::wstring::npos && last_dot < last_separator) {
+    // File name doesn't have extension, but one of the directories does; don't
+    // replace it, just append the supplied extension. For example
+    // 'c:\tmp.bar\foo'.
+    AppendExtension(extension, file_name);
+    return;
+  }
+  std::wstring result = file_name->substr(0, last_dot);
+  AppendExtension(extension, &result);
+  file_name->swap(result);
+}
 int CountFilesCreatedAfter(const std::wstring& path,
                            const FILETIME& comparison_time) {
   int file_count = 0;