Move path functions from file_util to FilePath object.

base/files/file_path.cc

Index: base/files/file_path.cc
diff --git a/base/files/file_path.cc b/base/files/file_path.cc
index 407ec855b2d7ad06273715e51313fb7275285f3c..a96c710bcbfd873387685b5b3abdc61824221020 100644
--- a/base/files/file_path.cc
+++ b/base/files/file_path.cc
@@ -16,6 +16,7 @@
 #include "base/string_piece.h"
 #include "base/string_util.h"
 #include "base/strings/sys_string_conversions.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/utf_string_conversions.h"
 
 #if defined(OS_MACOSX)
@@ -521,6 +522,45 @@ bool FilePath::IsAbsolute() const {
   return IsPathAbsolute(path_);
 }
 
+FilePath FilePath::AsAbsolute() const {
+  base::ThreadRestrictions::AssertIOAllowed();
+
+#if defined(OS_WIN)
+  wchar_t file_path[MAX_PATH];
+  if (!_wfullpath(file_path, path_.c_str(), MAX_PATH))
+    return FilePath();
+  return FilePath(file_path);
+#elif defined(OS_NACL)
+  // Nacl doesn't have realpath and there's not a lot you can do inside the
+  // sandbox with files.
+  // TODO(brettw) implement something more reasonable if we need it.
+  return *this;
+#elif defined(OS_POSIX)
+  char full_path[PATH_MAX];
+  if (realpath(path_.c_str(), full_path) == NULL)
+    return FilePath();
+  return FilePath(full_path);
+#endif
+}
+
+bool FilePath::EndsWithSeparator() const {
+  if (empty())
+    return false;
+  return IsSeparator(path_[path_.size() - 1]);
+}
+
+FilePath FilePath::AsEndingWithSeparator() const {
+  if (EndsWithSeparator())
+    return *this;
+
+  StringType path_str;
+  path_str.reserve(path_.length() + 1);  // Only allocate string once.
+
+  path_str = path_;
+  path_str.append(&kSeparators[0], 1);
+  return FilePath(path_str);
+}
+
 FilePath FilePath::StripTrailingSeparators() const {
   FilePath new_path(path_);
   new_path.StripTrailingSeparatorsInternal();