Adds logging to file_util::WriteFile to figure out why writing

bookmarks is failing for some people. As a result of this I moved some
code from common/win_util to base/win_util so that file_util_win could
call it. The only changes to this code are formatting.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/2931

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@2312 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 22 insertions, 1 deletions

diff --git a/base/win_util.cc b/base/win_util.cc
index b03e06d..38a4133 100644
--- a/base/win_util.cc
+++ b/base/win_util.cc
@@ -331,6 +331,28 @@ bool UserAccountControlIsEnabled() {
   return (uac_enabled == 1);
 }
 
+std::wstring FormatMessage(unsigned messageid) {
+  wchar_t* string_buffer = NULL;
+  unsigned string_length = ::FormatMessage(
+      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+      FORMAT_MESSAGE_IGNORE_INSERTS, NULL, messageid, 0,
+      reinterpret_cast<wchar_t *>(&string_buffer), 0, NULL);
+
+  std::wstring formatted_string;
+  if (string_buffer) {
+    formatted_string = string_buffer;
+    LocalFree(reinterpret_cast<HLOCAL>(string_buffer));
+  } else {
+    // The formating failed. simply convert the message value into a string.
+    SStringPrintf(&formatted_string, L"message number %d", messageid);
+  }
+  return formatted_string;
+}
+
+std::wstring FormatLastWin32Error() {
+  return FormatMessage(GetLastError());
+}
+
 }  // namespace win_util
 
 #ifdef _MSC_VER
@@ -354,4 +376,3 @@ Also make sure you register the SDK with Visual Studio, by selecting \
 menu (see Start - All Programs - Microsoft Windows SDK - \
 Visual Studio Registration).
 #endif
-