GN: port Valgrind bots.

infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-GCC-x86_64-Release-Valgrind.json

Index: infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-GCC-x86_64-Release-Valgrind.json
diff --git a/infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-GCC-x86_64-Release-Valgrind.json b/infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-GCC-x86_64-Release-Valgrind.json
index aa78f06923a985b22be71ac87c0d5bd0e2577676..c3f9260744bbf80f29d3b869f3f8e41904897151 100644
--- a/infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-GCC-x86_64-Release-Valgrind.json
+++ b/infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-GCC-x86_64-Release-Valgrind.json
@@ -121,19 +121,38 @@
   },
   {
     "cmd": [
-      "make",
-      "most"
+      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
     ],
     "cwd": "[CUSTOM_/_B_WORK]/skia",
     "env": {
-      "BUILDTYPE": "Release",
-      "CHROME_HEADLESS": "1",
-      "CHROME_PATH": "[SLAVE_BUILD]/src",
-      "GYP_DEFINES": "skia_arch_type=x86_64 skia_release_optimization_level=1 skia_warnings_as_errors=1",
-      "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Ubuntu-GCC-x86_64-Release-Valgrind"
+      "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]"
+    },
+    "name": "fetch-gn"
+  },
+  {
+    "cmd": [
+      "gn",
+      "gen",
+      "[CUSTOM_/_B_WORK]/skia/out/Build-Ubuntu-GCC-x86_64-Release-Valgrind/Release",
+      "--args=cc=\"gcc\" cxx=\"g++\" is_debug=false"
+    ],
+    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]"
+    },
+    "name": "gn gen"
+  },
+  {
+    "cmd": [
+      "ninja",
+      "-C",
+      "[CUSTOM_/_B_WORK]/skia/out/Build-Ubuntu-GCC-x86_64-Release-Valgrind/Release"
+    ],
+    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]"
     },
-    "name": "build most"
+    "name": "ninja"
   },
   {
     "cmd": [