Fix GLTF viewer shader with wrong binding indices.

BUG=

Change-Id: Ifcc302280d52f4f1c1860d2a59b864372397ceb9
Reviewed-on: https://dawn-review.googlesource.com/1700
Commit-Queue: James Darpinian <jdarpinian@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
diff --git a/examples/glTFViewer/glTFViewer.cpp b/examples/glTFViewer/glTFViewer.cpp
index 2418dba..87ca15f 100644
--- a/examples/glTFViewer/glTFViewer.cpp
+++ b/examples/glTFViewer/glTFViewer.cpp
@@ -202,8 +202,8 @@
         auto oFSSourceTextured = R"(
             #version 450
 
-            layout(set = 0, binding = 1) uniform sampler u_samp;
-            layout(set = 0, binding = 2) uniform texture2D u_tex;
+            layout(set = 0, binding = 0) uniform sampler u_samp;
+            layout(set = 0, binding = 1) uniform texture2D u_tex;
 
             layout(location = 0) in vec3 v_normal;
             layout(location = 1) in vec2 v_texcoord;