Start consolidating cross-port file selection code into ui/base/dialogs.

chrome/browser/extensions/api/file_system/file_system_api.cc

Index: chrome/browser/extensions/api/file_system/file_system_api.cc
diff --git a/chrome/browser/extensions/api/file_system/file_system_api.cc b/chrome/browser/extensions/api/file_system/file_system_api.cc
index 37460db1aef09c2b98b80a19ac311f13bc8a0729..d5ed5a135308ec89b511d2e3166d9b5814040647 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.cc
+++ b/chrome/browser/extensions/api/file_system/file_system_api.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
+#include "chrome/browser/chrome_select_file_policy.h"
 #include "chrome/browser/extensions/shell_window_registry.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/ui/extensions/shell_window.h"
@@ -126,13 +127,16 @@ class FileSystemPickerFunction::FilePicker : public SelectFileDialog::Listener {
     gfx::NativeWindow owning_window = web_contents ?
         platform_util::GetTopLevel(web_contents->GetNativeView()) : NULL;
 
-    select_file_dialog_->SelectFile(for_save ?
-                                        SelectFileDialog::SELECT_SAVEAS_FILE :
-                                        SelectFileDialog::SELECT_OPEN_FILE,
-                                    string16(),
-                                    suggested_path,
-                                    &file_type_info, 0, FILE_PATH_LITERAL(""),
-                                    web_contents, owning_window, NULL);
+    select_file_dialog_->SelectFile(
+        for_save ?
+            SelectFileDialog::SELECT_SAVEAS_FILE :
+            SelectFileDialog::SELECT_OPEN_FILE,
+        string16(),
+        suggested_path,
+        &file_type_info, 0, FILE_PATH_LITERAL(""),
+        ChromeSelectFilePolicy::DisplayInfobarCallback(web_contents),
+        owning_window,
+        NULL);
   }
 
   virtual ~FilePicker() {}