[canvaskit] Add config key and manual mode to unit test harness.

Change-Id: Ic72f31ba7833c23f7baf4872d05671a7c3808e34
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/333216
Reviewed-by: Chris Dalton <csmartdalton@google.com>

infra/bots/gen_tasks_logic/gen_tasks_logic.go

@@ -1789,10 +1789,11 @@ func (b *jobBuilder) runWasmGMTests() {
 			"--tryjob_id", specs.PLACEHOLDER_BUILDBUCKET_BUILD_ID,
 			// TODO(kjlubick, nifong) Make these not hard coded if we change the configs we test on.
 			"--webgl_version", "2", // 0 means CPU ; this flag controls cpu_or_gpu and extra_config
-			"--gold_key", "browser:Chrome",
 			"--gold_key", "alpha_type:Premul",
 			"--gold_key", "arch:wasm",
+			"--gold_key", "browser:Chrome",
 			"--gold_key", "color_depth:8888",
+			"--gold_key", "config:gles",
 			"--gold_key", "configuration:Release",
 			"--gold_key", "cpu_or_gpu_value:QuadroP400",
 			"--gold_key", "model:Golo",

infra/bots/tasks.json

@@ -45517,14 +45517,16 @@
         "--webgl_version",
         "2",
         "--gold_key",
-        "browser:Chrome",
-        "--gold_key",
         "alpha_type:Premul",
         "--gold_key",
         "arch:wasm",
         "--gold_key",
+        "browser:Chrome",
+        "--gold_key",
         "color_depth:8888",
         "--gold_key",
+        "config:gles",
+        "--gold_key",
         "configuration:Release",
         "--gold_key",
         "cpu_or_gpu_value:QuadroP400",

tools/run-wasm-gm-tests/Makefile

@@ -7,4 +7,5 @@ run_local:
         --resources ../../resources \
         --known_hashes /tmp/wasm-gmtests/empty.txt \
         --output /tmp/wasm-gmtests/ \
-        --use_gpu --timeout 600
+        --use_gpu --timeout 600 \
+        --manual_mode

tools/run-wasm-gm-tests/run-wasm-gm-tests.js

@@ -62,6 +62,11 @@ const opts = [
     description: 'Number of seconds to allow test to run.',
     type: Number,
   },
+  {
+    name: 'manual_mode',
+    description: 'If set, tests will not run automatically.',
+    type: Boolean,
+  }
 ];
 
 const usage = [
@@ -175,7 +180,7 @@ app.post('/write_png', (req, res) => {
   const newFile = path.join(options.output, md5 + '.png');
   fs.writeFileSync(newFile, data, {
     encoding: 'binary',
-  })
+  });
   res.sendStatus(200);
 });
 
@@ -230,6 +235,15 @@ async function driveBrowser() {
       waitUntil: 'networkidle0'
     });
 
+    if (options.manual_mode) {
+      console.log('Manual mode detected. Will hang');
+      // Wait a very long time, with the web server running.
+      await page.waitForFunction(`window._abort_manual_mode`, {
+        timeout: 1000000000,
+        polling: 1000,
+      });
+    }
+
     // Page is mostly loaded, wait for test harness page to report itself ready. Some resources
     // may still be loading.
     console.log('Waiting 30s for test harness to be ready');