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

chrome/browser/download/download_file_picker.cc

Index: chrome/browser/download/download_file_picker.cc
diff --git a/chrome/browser/download/download_file_picker.cc b/chrome/browser/download/download_file_picker.cc
index dbac2ae97423e445534adfaf6ea32150b4a04be9..c115cab2da8e40b4c35c470c1ed340da72366f49 100644
--- a/chrome/browser/download/download_file_picker.cc
+++ b/chrome/browser/download/download_file_picker.cc
@@ -7,6 +7,7 @@
 #include "base/metrics/histogram.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/platform_util.h"
+#include "chrome/browser/ui/chrome_select_file_policy.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager.h"
 #include "content/public/browser/web_contents.h"
@@ -64,7 +65,9 @@ void DownloadFilePicker::Init(DownloadManager* download_manager,
   InitSuggestedPath(item);
 
   DCHECK(download_manager_);
-  select_file_dialog_ = SelectFileDialog::Create(this);
+  WebContents* web_contents = item->GetWebContents();
+  select_file_dialog_ = SelectFileDialog::Create(
+      this, new ChromeSelectFilePolicy(web_contents));
   SelectFileDialog::FileTypeInfo file_type_info;
   FilePath::StringType extension = suggested_path_.Extension();
   if (!extension.empty()) {
@@ -73,15 +76,18 @@ void DownloadFilePicker::Init(DownloadManager* download_manager,
     file_type_info.extensions[0].push_back(extension);
   }
   file_type_info.include_all_files = true;
-  WebContents* web_contents = item->GetWebContents();
   gfx::NativeWindow owning_window = web_contents ?
       platform_util::GetTopLevel(web_contents->GetNativeView()) : NULL;
 
-  select_file_dialog_->SelectFile(SelectFileDialog::SELECT_SAVEAS_FILE,
-                                  string16(),
-                                  suggested_path_,
-                                  &file_type_info, 0, FILE_PATH_LITERAL(""),
-                                  web_contents, owning_window, NULL);
+  select_file_dialog_->SelectFile(
+      SelectFileDialog::SELECT_SAVEAS_FILE,
+      string16(),
+      suggested_path_,
+      &file_type_info,
+      0,
+      FILE_PATH_LITERAL(""),
+      owning_window,
+      NULL);
 }
 
 DownloadFilePicker::~DownloadFilePicker() {