diff --git a/core/modules/file/file.module b/core/modules/file/file.module
index fd2b269..c32b876 100644
--- a/core/modules/file/file.module
+++ b/core/modules/file/file.module
@@ -560,20 +560,10 @@ function file_save_data($data, $destination = NULL, $replace = FILE_EXISTS_RENAM
 function file_get_content_headers(File $file) {
   $name = mime_header_encode($file->filename);
   $type = mime_header_encode($file->filemime);
-  // Serve images, text, and flash content for display rather than download.
-  $inline_types = variable_get('file_inline_types', array('^text/', '^image/', 'flash$'));
-  $disposition = 'attachment';
-  foreach ($inline_types as $inline_type) {
-    // Exclamation marks are used as delimiters to avoid escaping slashes.
-    if (preg_match('!' . $inline_type . '!', $file->filemime)) {
-      $disposition = 'inline';
-    }
-  }
 
   return array(
     'Content-Type' => $type,
     'Content-Length' => $file->filesize,
-    'Content-Disposition' => $disposition . '; filename="' . $name . '"',
     'Cache-Control' => 'private',
   );
 }
diff --git a/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php b/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php
index c07acf6..d7314a8 100644
--- a/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php
+++ b/core/modules/image/lib/Drupal/image/Tests/ImageFieldDisplayTest.php
@@ -78,7 +78,6 @@ function _testImageFieldFormatters($scheme) {
       // Only verify HTTP headers when using private scheme and the headers are
       // sent by Drupal.
       $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png', 'Content-Type header was sent.');
-      $this->assertEqual($this->drupalGetHeader('Content-Disposition'), 'inline; filename="' . $test_image->filename . '"', 'Content-Disposition header was sent.');
       $this->assertTrue(strstr($this->drupalGetHeader('Cache-Control'),'private') !== FALSE, 'Cache-Control header was sent.');
 
       // Log out and try to access the file.
diff --git a/core/modules/picture/lib/Drupal/picture/Tests/PictureFieldDisplayTest.php b/core/modules/picture/lib/Drupal/picture/Tests/PictureFieldDisplayTest.php
index 69b0231..c7e569d 100644
--- a/core/modules/picture/lib/Drupal/picture/Tests/PictureFieldDisplayTest.php
+++ b/core/modules/picture/lib/Drupal/picture/Tests/PictureFieldDisplayTest.php
@@ -150,7 +150,6 @@ public function _testPictureFieldFormatters($scheme) {
       // Only verify HTTP headers when using private scheme and the headers are
       // sent by Drupal.
       $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png', 'Content-Type header was sent.');
-      $this->assertEqual($this->drupalGetHeader('Content-Disposition'), 'inline; filename="' . $test_image->filename . '"', 'Content-Disposition header was sent.');
       $this->assertTrue(strstr($this->drupalGetHeader('Cache-Control'), 'private') !== FALSE, 'Cache-Control header was sent.');
 
       // Log out and try to access the file.