Remove PDF JPEG shortcut, since it fails on grayscale JPEGs.

gm/grayscalejpg.cpp

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Resources.h"
+#include "SkCanvas.h"
+#include "gm.h"
+
+/*
+ *  Test decoding grayscale JPEG
+ *  http://crbug.com/436079
+ */
+DEF_SIMPLE_GM(grayscalejpg, canvas, 128, 128) {
+    const char kResource[] = "grayscale.jpg";
+    SkBitmap bitmap;
+    if (GetResourceAsBitmap(kResource, &bitmap)) {
+        canvas->drawBitmap(bitmap, 0.0f, 0.0f);
+    } else {
+        SkDebugf("\nCould not decode file '%s'. Did you forget"
+                 " to set the resourcePath?\n", kResource);
+    }
+}