tint: Fix `[chromium-style]` auto pointer warnings

Needed to fix Dawn -> Tint roll

Change-Id: I9b889320bbac6518620896ada7a53dd3cb95f01a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/88662
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/tint/inspector/inspector.cc

diff --git a/src/tint/inspector/inspector.cc b/src/tint/inspector/inspector.cc
index 7e5a6af..ebae93f 100644
--- a/src/tint/inspector/inspector.cc
+++ b/src/tint/inspector/inspector.cc
@@ -560,8 +560,8 @@
 
     // Ast nodes for enable directive are stored within global declarations list
     auto global_decls = program_->AST().GlobalDeclarations();
-    for (auto node : global_decls) {
-        if (auto ext = node->As<ast::Enable>()) {
+    for (auto* node : global_decls) {
+        if (auto* ext = node->As<ast::Enable>()) {
             result.push_back({ext->name, ext->source});
         }
     }