Don't save last used locations in open and save dialogs when in incognito mode.

chrome/browser/tab_contents/tab_contents.cc

Index: chrome/browser/tab_contents/tab_contents.cc
diff --git a/chrome/browser/tab_contents/tab_contents.cc b/chrome/browser/tab_contents/tab_contents.cc
index 8e2fff53d930b006ff38243e16e0ce52f2c88354..eed7922d2e1015102af467174a01130e253d437d 100644
--- a/chrome/browser/tab_contents/tab_contents.cc
+++ b/chrome/browser/tab_contents/tab_contents.cc
@@ -2577,8 +2577,11 @@ void TabContents::RunFileChooser(
       dialog_type = SelectFileDialog::SELECT_OPEN_FILE;  // Prevent warning.
       NOTREACHED();
   }
+  FilePath default_file_name = params.default_file_name;
+  if (default_file_name.empty())
+    default_file_name = profile()->last_selected_directory();
   select_file_dialog_->SelectFile(dialog_type, params.title,
-                                  params.default_file_name,
+                                  default_file_name,
                                   NULL, 0, FILE_PATH_LITERAL(""),
                                   view_->GetTopLevelNativeWindow(), NULL);
 }
@@ -2839,6 +2842,7 @@ void TabContents::FocusedNodeChanged() {
 
 void TabContents::FileSelected(const FilePath& path,
                                int index, void* params) {
+  profile()->set_last_selected_directory(path.DirName());
   std::vector<FilePath> files;
   files.push_back(path);
   render_view_host()->FilesSelectedInChooser(files);
@@ -2846,6 +2850,8 @@ void TabContents::FileSelected(const FilePath& path,
 
 void TabContents::MultiFilesSelected(const std::vector<FilePath>& files,
                                      void* params) {
+  if (!files.empty())
+    profile()->set_last_selected_directory(files[0].DirName());
   render_view_host()->FilesSelectedInChooser(files);
 }