Repro:

1) ninja -C <out> system_webview_apk
2) edit AwContents.java, add a new method to NativeGLDelegate interface. Do *not* edit implementation in WebViewChromium.java
3) ninja -C <out> system_webview_apk should fail, but passes. Then this ends up being a runtime error.

'find <out> -name "*.d" -delete' fixed it

I had two checkouts that had this issue. args.gn for both:

target_os = "android"
target_cpu = "arm"
dcheck_always_on = true
is_debug = false
is_component_build = true
is_clang = true
symbol_level = 1
system_webview_package_name = "com.google.android.webview"
run_findbugs = false
use_goma = false


target_os = "android"
target_cpu = "arm64"
dcheck_always_on = false
is_debug = false
is_component_build = true
is_clang = false
system_webview_package_name = "com.google.android.webview"
use_signing_keys = true
use_goma = false
use_unpublished_apis = true
use_webview_internal_framework = true
android_default_version_code="300000000"


That second one is still broken, if you need anything. Can't promise how long I can keep it like that though