[Findit] Check existence of given targets before running compile in recipe findit/chromium/compile.

scripts/slave/recipes/findit/chromium/compile.expected/compile_none_existing_targets.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.chromium.linux",
       "--builder",
       "linux_variable",
@@ skipping 352 matching lines @@
       "@@@STEP_NEST_LEVEL@1@@@",
       "@@@STEP_TEXT@path: [SLAVE_BUILD]/src/testing/buildbot/chromium.linux.json@@@",
       "@@@STEP_LOG_LINE@json.output@{}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/cleanup_temp.py"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "test r1.cleanup_temp",
-    "~followup_annotations": [
-      "@@@STEP_NEST_LEVEL@1@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
       "[SLAVE_BUILD]/src/tools/mb/mb.py",
       "gen",
       "-m",
       "chromium.linux",
       "-b",
       "Linux Builder",
       "--config-file",
       "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
       "--goma-dir",
       "[BUILD]/goma",
       "//out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "test r1.generate_build_files",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[BUILD]/scripts/slave/compile.py",
+      "[BUILD]/scripts/slave/check_target_existence.py",
+      "--target-build-dir",
+      "[SLAVE_BUILD]/src/out/Release",
       "--target",
-      "Release",
-      "--src-dir",
-      "[SLAVE_BUILD]/src",
-      "--build-tool",
-      "ninja",
-      "--compiler",
-      "goma",
-      "--goma-jsonstatus",
-      "/path/to/tmp/json",
-      "--goma-dir",
-      "[SLAVE_BUILD]/src/build/goma/client",
-      "--ninja-ensure-up-to-date",
-      "--",
-      "target_name"
+      "gen/a/b/source.cc",
+      "--json-output",
+      "/path/to/tmp/json"
     ],
     "cwd": "[SLAVE_BUILD]",
-    "name": "test r1.compile",
+    "name": "test r1.check_targets",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@",
-      "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
-      "@@@STEP_LOG_END@json.output (invalid)@@@"
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"found\": [], @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"not_found\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"gen/a/b/source.cc\"@@@",
+      "@@@STEP_LOG_LINE@json.output@  ]@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "import sys; sys.exit(0)"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "report",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@report@{@@@",
       "@@@STEP_LOG_LINE@report@  \"result\": {@@@",
-      "@@@STEP_LOG_LINE@report@    \"r1\": \"passed\"@@@",
+      "@@@STEP_LOG_LINE@report@    \"r1\": \"skipped\"@@@",
       "@@@STEP_LOG_LINE@report@  }, @@@",
       "@@@STEP_LOG_LINE@report@  \"metadata\": {@@@",
       "@@@STEP_LOG_LINE@report@    \"regression_range_size\": 1@@@",
       "@@@STEP_LOG_LINE@report@  }@@@",
       "@@@STEP_LOG_LINE@report@}@@@",
       "@@@STEP_LOG_END@report@@@",
-      "@@@SET_BUILD_PROPERTY@report@{\"metadata\": {\"regression_range_size\": 1}, \"result\": {\"r1\": \"passed\"}}@@@"
+      "@@@SET_BUILD_PROPERTY@report@{\"metadata\": {\"regression_range_size\": 1}, \"result\": {\"r1\": \"skipped\"}}@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]