Support accept attribute for an <input type=file> element....

chrome/browser/tab_contents/tab_contents_file_select_helper.h

Index: chrome/browser/tab_contents/tab_contents_file_select_helper.h
===================================================================
--- chrome/browser/tab_contents/tab_contents_file_select_helper.h	(revision 58709)
+++ chrome/browser/tab_contents/tab_contents_file_select_helper.h	(working copy)
@@ -46,6 +46,12 @@
   // Helper method for handling the SelectFileDialog::Listener callbacks.
   void DirectorySelected(const FilePath& path);
 
+  // Helper method to get allowed extensions for select file dialog from
+  // the specified accept types as defined in the spec:
+  //   http://whatwg.org/html/number-state.html#attr-input-accept
+  SelectFileDialog::FileTypeInfo* GetFileTypesFromAcceptType(
+      const string16& accept_types);
+
   // The tab contents this class is helping.  |tab_contents_| owns this object,
   // so this pointer is guaranteed to be valid.
   TabContents* tab_contents_;