Add dependency overrides for pkg/front_end

These dependency overrides prevent pub from getting confused about the
fact that our SDK development is in a mono-repo; that in turn allows
unit tests to be run from inside vscode using the standard test
integration.

Change-Id: I7629375f0ba4b07cd9ccdbb69f243d8eb0aa555a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/295660
Reviewed-by: Jens Johansen <jensj@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
diff --git a/pkg/front_end/pubspec.yaml b/pkg/front_end/pubspec.yaml
index b6fbfbd..c5c10e4 100644
--- a/pkg/front_end/pubspec.yaml
+++ b/pkg/front_end/pubspec.yaml
@@ -34,3 +34,41 @@
   vm: any
   web_socket_channel: any
   yaml: any
+
+dependency_overrides:
+  _fe_analyzer_shared:
+    path: ../_fe_analyzer_shared
+  _js_interop_checks:
+    path: ../_js_interop_checks
+  async_helper:
+    path: ../async_helper
+  build_integration:
+    path: ../build_integration
+  compiler:
+    path: ../compiler
+  dart2js_info:
+    path: ../dart2js_info
+  dart2wasm:
+    path: ../dart2wasm
+  dev_compiler:
+    path: ../dev_compiler
+  expect:
+    path: ../expect
+  js_ast:
+    path: ../js_ast
+  js_runtime:
+    path: ../js_runtime
+  js_shared:
+    path: ../js_shared
+  kernel:
+    path: ../kernel
+  mmap:
+    path: ../mmap
+  smith:
+    path: ../smith
+  testing:
+    path: ../testing
+  vm:
+    path: ../vm
+  wasm_builder:
+    path: ../wasm_builder