V8: Get build environment from MB

scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder_with_gn.json

Index: scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder_with_gn.json
diff --git a/scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder.json b/scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder_with_gn.json
similarity index 95%
copy from scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder.json
copy to scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder_with_gn.json
index ddb0d78fe63009527fca6ec6b15b8d6a6ee03786..e4f1c4cf9a6701497ab12d1d0e679cee45798c29 100644
--- a/scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder.json
+++ b/scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64___builder_with_gn.json
@@ -182,17 +182,13 @@
     "name": "generate_build_files",
     "stdout": "/path/to/tmp/",
     "~followup_annotations": [
-      "@@@STEP_LOG_LINE@stdout@some line@@@",
-      "@@@STEP_LOG_LINE@stdout@GYP_DEFINES='target_arch=x64 cool_flag=a=1'@@@",
+      "@@@STEP_LOG_LINE@stdout@Writing \"\"\"\\@@@",
+      "@@@STEP_LOG_LINE@stdout@goma_dir = \"/b/build/slave/cache/cipd/goma\"@@@",
+      "@@@STEP_LOG_LINE@stdout@target_cpu = \"x64\"@@@",
+      "@@@STEP_LOG_LINE@stdout@use_goma = true@@@",
+      "@@@STEP_LOG_LINE@stdout@\"\"\" to /path/to/args.gn.@@@",
       "@@@STEP_LOG_LINE@stdout@moar@@@",
-      "@@@STEP_LOG_END@stdout@@@",
-      "@@@STEP_LOG_LINE@diff@- gomadir: '[CACHE]/cipd/goma'@@@",
-      "@@@STEP_LOG_LINE@diff@+ cool_flag: a=1@@@",
-      "@@@STEP_LOG_LINE@diff@  target_arch: x64@@@",
-      "@@@STEP_LOG_LINE@diff@- test_isolation_mode: prepare@@@",
-      "@@@STEP_LOG_LINE@diff@- use_goma: 1@@@",
-      "@@@STEP_LOG_END@diff@@@",
-      "@@@STEP_WARNINGS@@@"
+      "@@@STEP_LOG_END@stdout@@@"
     ]
   },
   {
@@ -385,8 +381,7 @@
         "builder_name": "V8 Linux64",
         "properties": {
           "parent_build_environment": {
-            "GYP_DEFINES": "target_arch=x64 test_isolation_mode=prepare use_goma=1 v8_target_arch=x64",
-            "GYP_GENERATORS": "ninja"
+            "gn_args": "target_cpu = \"x64\" use_goma = true"
           },
           "parent_got_revision": "f2cbea7e89a45f46819777bb78a1f5bd0241f64c",
           "parent_got_revision_cp": "refs/heads/master@{#50110}",
@@ -410,8 +405,7 @@
         "builder_name": "V8 Linux64 - avx2",
         "properties": {
           "parent_build_environment": {
-            "GYP_DEFINES": "target_arch=x64 test_isolation_mode=prepare use_goma=1 v8_target_arch=x64",
-            "GYP_GENERATORS": "ninja"
+            "gn_args": "target_cpu = \"x64\" use_goma = true"
           },
           "parent_got_revision": "f2cbea7e89a45f46819777bb78a1f5bd0241f64c",
           "parent_got_revision_cp": "refs/heads/master@{#50110}",
@@ -452,8 +446,7 @@
         "properties": {
           "archive": "gs://chromium-v8/v8-linux64-rel",
           "parent_build_environment": {
-            "GYP_DEFINES": "target_arch=x64 test_isolation_mode=prepare use_goma=1 v8_target_arch=x64",
-            "GYP_GENERATORS": "ninja"
+            "gn_args": "target_cpu = \"x64\" use_goma = true"
           },
           "parent_got_revision": "f2cbea7e89a45f46819777bb78a1f5bd0241f64c",
           "parent_got_revision_cp": "refs/heads/master@{#50110}",