Implement device-ram client hints header

third_party/WebKit/LayoutTests/http/tests/misc/client-hints-invalid-accept.php

Index: third_party/WebKit/LayoutTests/http/tests/misc/client-hints-invalid-accept.php
diff --git a/third_party/WebKit/LayoutTests/http/tests/misc/client-hints-invalid-accept.php b/third_party/WebKit/LayoutTests/http/tests/misc/client-hints-invalid-accept.php
index aa31dd4cc5de0657a9221a01d50e885050d894ce..1d155195224dc843516e1eaba43d296b57666a1a 100644
--- a/third_party/WebKit/LayoutTests/http/tests/misc/client-hints-invalid-accept.php
+++ b/third_party/WebKit/LayoutTests/http/tests/misc/client-hints-invalid-accept.php
@@ -11,11 +11,18 @@
             assert_unreached("Image should not have loaded.");
         };
 
+        var loadDeviceRAMImage = function() {
+            var img = new Image();
+            img.src = 'resources/image-checks-for-device-ram.php';
+            img.onload = t.step_func(unreached);
+            img.onerror = t.step_func(function(){ t.done(); });
+            document.body.appendChild(img);
+        };
         var loadRWImage = function() {
             var img = new Image();
             img.src = 'resources/image-checks-for-rw.php';
             img.onload = t.step_func(unreached);
-            img.onerror = t.step_func(function(){ t.done(); });
+            img.onerror = t.step_func(loadDeviceRAMImage);
             document.body.appendChild(img);
         };
         t.step(function() {