[HHH] update ENGINE_PATH

After https://dart-review.googlesource.com/c/recipes/+/175080 the
ENGINE_PATH should have an extra folder.

ENGINE_PATH: /b/s/w/ir/cache/builder is failing.
ENGINE_PATH: /b/s/w/ir/cache/builder/engine should work.

The following works locally, indicating ENGINE_PATH should point to the
engine folder:
ENGINE_PATH=~/flt/engine WEB_UI_DIR=~/flt/engine/src/flutter/lib/web_ui/ src/flutter/lib/web_ui/dev/web_engine_analysis.sh

Change-Id: I551def9d65932287430e3ce9c805dfdb8f43d2d2
Reviewed-on: https://dart-review.googlesource.com/c/recipes/+/176260
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>
diff --git a/recipes/dart/flutter_engine.expected/flutter-engine-linux.json b/recipes/dart/flutter_engine.expected/flutter-engine-linux.json
index 21b0c47..36edca1 100644
--- a/recipes/dart/flutter_engine.expected/flutter-engine-linux.json
+++ b/recipes/dart/flutter_engine.expected/flutter-engine-linux.json
@@ -6318,7 +6318,7 @@
       "ANALYZER_STATE_LOCATION_OVERRIDE": "[CACHE]/builder/.dartServer",
       "ANDROID_SDK_ROOT": "[CACHE]/builder/engine/src/third_party/android_tools/sdk",
       "CHROME_EXECUTABLE": "[CACHE]/builder/engine/src/flutter/third_party/browsers/chrome/chrome/google-chrome",
-      "ENGINE_PATH": "[CACHE]/builder",
+      "ENGINE_PATH": "[CACHE]/builder/engine",
       "GOMA_DIR": "[CACHE]/goma/client",
       "PATH": "[CACHE]/builder/engine/src/out/host_debug/dart-sdk/bin:<PATH>",
       "TEST_COMMIT_RANGE": "HEAD",
diff --git a/recipes/dart/flutter_engine.expected/only-run-webtests-suite.json b/recipes/dart/flutter_engine.expected/only-run-webtests-suite.json
index 57e1ba5..3f17ed9 100644
--- a/recipes/dart/flutter_engine.expected/only-run-webtests-suite.json
+++ b/recipes/dart/flutter_engine.expected/only-run-webtests-suite.json
@@ -6318,7 +6318,7 @@
       "ANALYZER_STATE_LOCATION_OVERRIDE": "[CACHE]/builder/.dartServer",
       "ANDROID_SDK_ROOT": "[CACHE]/builder/engine/src/third_party/android_tools/sdk",
       "CHROME_EXECUTABLE": "[CACHE]/builder/engine/src/flutter/third_party/browsers/chrome/chrome/google-chrome",
-      "ENGINE_PATH": "[CACHE]/builder",
+      "ENGINE_PATH": "[CACHE]/builder/engine",
       "GOMA_DIR": "[CACHE]/goma/client",
       "PATH": "[CACHE]/builder/engine/src/out/host_debug/dart-sdk/bin:<PATH>",
       "TEST_COMMIT_RANGE": "HEAD",
diff --git a/recipes/dart/flutter_engine.expected/run-all-test-suites.json b/recipes/dart/flutter_engine.expected/run-all-test-suites.json
index 21b0c47..36edca1 100644
--- a/recipes/dart/flutter_engine.expected/run-all-test-suites.json
+++ b/recipes/dart/flutter_engine.expected/run-all-test-suites.json
@@ -6318,7 +6318,7 @@
       "ANALYZER_STATE_LOCATION_OVERRIDE": "[CACHE]/builder/.dartServer",
       "ANDROID_SDK_ROOT": "[CACHE]/builder/engine/src/third_party/android_tools/sdk",
       "CHROME_EXECUTABLE": "[CACHE]/builder/engine/src/flutter/third_party/browsers/chrome/chrome/google-chrome",
-      "ENGINE_PATH": "[CACHE]/builder",
+      "ENGINE_PATH": "[CACHE]/builder/engine",
       "GOMA_DIR": "[CACHE]/goma/client",
       "PATH": "[CACHE]/builder/engine/src/out/host_debug/dart-sdk/bin:<PATH>",
       "TEST_COMMIT_RANGE": "HEAD",
diff --git a/recipes/dart/flutter_engine.py b/recipes/dart/flutter_engine.py
index 1d1c583..a68cd5b 100644
--- a/recipes/dart/flutter_engine.py
+++ b/recipes/dart/flutter_engine.py
@@ -325,7 +325,7 @@
 
     with api.context(
         env={
-            'ENGINE_PATH': start_dir,
+            'ENGINE_PATH': start_dir.join('engine'),
             'WEB_UI_DIR': engine_src.join('flutter', 'lib', 'web_ui')
         }):
       api.step(