First cut at Firefox import on OSX + stubs for Safari import.

chrome/browser/cocoa/first_run_dialog.h

Index: chrome/browser/cocoa/first_run_dialog.h
diff --git a/chrome/browser/cocoa/first_run_dialog.h b/chrome/browser/cocoa/first_run_dialog.h
index f7f2a11c6dbc34099d1059669ebf00693613098c..5e5bd1e42ce28a4e2172ca4d7e4f9675d20e5b0e 100644
--- a/chrome/browser/cocoa/first_run_dialog.h
+++ b/chrome/browser/cocoa/first_run_dialog.h
@@ -16,6 +16,7 @@
   BOOL make_default_browser_;
   BOOL import_bookmarks_;
   int  browser_import_selected_index_;
+  NSArray* browser_import_list_;
 }
 
 // Called when the "Start Google Chrome" button is pressed.
@@ -33,6 +34,7 @@
 @property(assign) BOOL makeDefaultBrowser;
 @property(assign) BOOL importBookmarks;
 @property(assign) int browserImportSelectedIndex;
+@property(retain) NSArray* browserImportList;
 
 @end