[telemetry] Clean up image decoding benchmark

tools/perf/page_sets/image_decoding_benchmark.json

Index: tools/perf/page_sets/image_decoding_benchmark.json
diff --git a/tools/perf/page_sets/image_decoding_benchmark.json b/tools/perf/page_sets/image_decoding_benchmark.json
new file mode 100644
index 0000000000000000000000000000000000000000..7cf6f6b22244fa7d391f9abb3c5da29e634efb12
--- /dev/null
+++ b/tools/perf/page_sets/image_decoding_benchmark.json
@@ -0,0 +1,23 @@
+{
+  "description": "A directed benchmark of image decoding performance",
+  "pages": [
+    {
+      "url": "file:///../../../chrome/test/data/image_decoding/image_decoding.html?gif",
+      "post_navigate_javascript_to_execute": "runBenchmark();",
+      "wait_for_javascript_expression": "isDone",
+      "image_decoding_benchmark_limit_results_to_min_iterations": true
+    },
+    {
+      "url": "file:///../../../chrome/test/data/image_decoding/image_decoding.html?jpg",
+      "post_navigate_javascript_to_execute": "runBenchmark();",
+      "wait_for_javascript_expression": "isDone",
+      "image_decoding_benchmark_limit_results_to_min_iterations": true
+    },
+    {
+      "url": "file:///../../../chrome/test/data/image_decoding/image_decoding.html?png",
+      "post_navigate_javascript_to_execute": "runBenchmark();",
+      "wait_for_javascript_expression": "isDone",
+      "image_decoding_benchmark_limit_results_to_min_iterations": true
+    }
+  ]
+}