Revert of Switch Android gtests to use generated wrapper scripts

scripts/slave/recipes/chromium.expected/full_chromium_webkit_WebKit_Android__Nexus4_.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "chromium.webkit",
       "--builder",
       "WebKit Android (Nexus4)",
@@ skipping 532 matching lines @@
       "--blacklist-file",
       "[SLAVE_BUILD]/src/out/bad_devices.json"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "spawn_device_monitor"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]/src/out/Release/bin/run_blink_heap_unittests",
+      "[SLAVE_BUILD]/src/build/android/test_runner.py",
+      "gtest",
+      "-s",
+      "blink_heap_unittests",
       "--blacklist-file",
       "[SLAVE_BUILD]/src/out/bad_devices.json",
       "--verbose",
+      "--release",
       "--flakiness-dashboard-server=test-results.appspot.com",
       "--json-results-file",
       "/path/to/tmp/json"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
+      "CHROMIUM_OUTPUT_DIR": "[SLAVE_BUILD]/src/out/Release",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "blink_heap_unittests"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]/src/out/Release/bin/run_webkit_unit_tests",
+      "[SLAVE_BUILD]/src/build/android/test_runner.py",
+      "gtest",
+      "-s",
+      "webkit_unit_tests",
       "--blacklist-file",
       "[SLAVE_BUILD]/src/out/bad_devices.json",
       "--verbose",
+      "--release",
       "--flakiness-dashboard-server=test-results.appspot.com",
       "--json-results-file",
       "/path/to/tmp/json"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
+      "CHROMIUM_OUTPUT_DIR": "[SLAVE_BUILD]/src/out/Release",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "webkit_unit_tests"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/runtest.py",
       "--target",
@@ skipping 156 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]