Issue #1773032 by Jorrit, quicksketch: Fixed Non-standard and pointless name...

Issue #1773032 by Jorrit, quicksketch: Fixed Non-standard and pointless name attribute added to Content-Type header.

core/modules/file/file.module

@@ -710,7 +710,7 @@ function file_get_content_headers(File $file) {
   }
 
   return array(
-    'Content-Type' => $type . '; name="' . $name . '"',
+    'Content-Type' => $type,
     'Content-Length' => $file->filesize,
     'Content-Disposition' => $disposition . '; filename="' . $name . '"',
     'Cache-Control' => 'private',

core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php

@@ -77,7 +77,7 @@ function _testImageFieldFormatters($scheme) {
     if ($scheme == 'private') {
       // Only verify HTTP headers when using private scheme and the headers are
       // sent by Drupal.
-      $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png; name="' . $test_image->filename . '"', t('Content-Type header was sent.'));
+      $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png', t('Content-Type header was sent.'));
       $this->assertEqual($this->drupalGetHeader('Content-Disposition'), 'inline; filename="' . $test_image->filename . '"', t('Content-Disposition header was sent.'));
       $this->assertTrue(strstr($this->drupalGetHeader('Cache-Control'),'private') !== FALSE, t('Cache-Control header was sent.'));