chromeos: Stop linking fake D-Bus clients to shipped chrome

Set use_real_dbus_clients to true when building for real devices.

chromeos-amd64-generic-rel and chromeos-betty-pi-arc-chrome build chrome
for real devices, but run interactive_ui_tests which relies on fake
D-Bus clients.
Change mb_config.pyl to set use_real_dbus_clients to false for them.

BUG=952745
TEST=chrome binary size reduced by 460KB on eve.

Change-Id: Ibbb08babe5b693447158fc9192d1df854992e29f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2282635Reviewed-by: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Ryo Hashimoto <hashimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786629}

chromeos/dbus/BUILD.gn

@@ -9,7 +9,7 @@ assert(is_chromeos, "Non-Chrome-OS builds must not depend on //chromeos")
 
 declare_args() {
   # Instantiate real D-Bus clients instead of fakes.
-  use_real_dbus_clients = false
+  use_real_dbus_clients = is_chromeos_device
 }
 
 component("dbus") {

tools/mb/mb_config.pyl

@@ -16,7 +16,7 @@
     'chrome': {
       'chromeos-arm-generic-cfi-thin-lto-chrome': 'chromeos_arm-generic_cfi_thin_lto_official',
       'chromeos-betty-pi-arc-cfi-thin-lto-chrome': 'chromeos_betty-pi-arc_cfi_thin_lto_official',
-      'chromeos-betty-pi-arc-chrome': 'chromeos_betty-pi-arc_include_unwind_tables_official',
+      'chromeos-betty-pi-arc-chrome': 'chromeos_betty-pi-arc_include_unwind_tables_official_use_fake_dbus_clients',
       'chromeos-eve-chrome': 'chromeos_eve_include_unwind_tables_official',
       'chromeos-eve-arc-r-chrome': 'chromeos_eve-arc-r_include_unwind_tables_official',
       'chromeos-kevin-chrome': 'chromeos_kevin_include_unwind_tables_official',
@@ -125,7 +125,7 @@
       'chromeos-amd64-generic-asan-rel': 'chromeos_amd64-generic_asan',
       'chromeos-amd64-generic-cfi-thin-lto-rel': 'chromeos_amd64-generic_cfi_thin_lto',
       'chromeos-amd64-generic-dbg': 'chromeos_amd64-generic_dbg',
-      'chromeos-amd64-generic-rel': 'chromeos_amd64-generic',
+      'chromeos-amd64-generic-rel': 'chromeos_amd64-generic_use_fake_dbus_clients',
       'chromeos-arm-generic-dbg': 'chromeos_arm-generic_dbg',
       'chromeos-arm-generic-rel': 'chromeos_arm-generic',
       'chromeos-kevin-rel': 'chromeos_kevin',
@@ -784,7 +784,7 @@
     'tryserver.chrome': {
       'chromeos-arm-generic-cfi-thin-lto-chrome': 'chromeos_arm-generic_cfi_thin_lto_official',
       'chromeos-betty-pi-arc-cfi-thin-lto-chrome': 'chromeos_betty-pi-arc_cfi_thin_lto_official',
-      'chromeos-betty-pi-arc-chrome': 'chromeos_betty-pi-arc_include_unwind_tables_official',
+      'chromeos-betty-pi-arc-chrome': 'chromeos_betty-pi-arc_include_unwind_tables_official_use_fake_dbus_clients',
       'chromeos-eve-arc-r-chrome': 'chromeos_eve-arc-r_include_unwind_tables_official',
       'chromeos-eve-chrome': 'chromeos_eve_include_unwind_tables_official',
       'chromeos-eve-compile-chrome': 'chromeos_eve_include_unwind_tables_official',
@@ -809,7 +809,7 @@
       # and two kevin bots when the PFQ has it enabled.
       'chromeos-amd64-generic-cfi-thin-lto-rel': 'chromeos_amd64-generic_cfi_thin_lto',
       'chromeos-amd64-generic-dbg': 'chromeos_amd64-generic_dbg',
-      'chromeos-amd64-generic-rel': 'chromeos_amd64-generic',
+      'chromeos-amd64-generic-rel': 'chromeos_amd64-generic_use_fake_dbus_clients',
       'chromeos-arm-generic-dbg': 'chromeos_arm-generic_dbg',
       'chromeos-arm-generic-rel': 'chromeos_arm-generic_dcheck_always_on',
       'chromeos-kevin-compile-rel': 'chromeos_kevin',
@@ -1488,6 +1488,10 @@
       'chromeos_amd64-generic', 'debug',
     ],
 
+    'chromeos_amd64-generic_use_fake_dbus_clients': [
+      'chromeos_amd64-generic', 'use_fake_dbus_clients',
+    ],
+
     'chromeos_arm-generic': [
       'chromeos_device', 'arm-generic',
     ],
@@ -1515,8 +1519,8 @@
       'chromeos_lto_link_jobs',
     ],
 
-    'chromeos_betty-pi-arc_include_unwind_tables_official': [
-      'chromeos_device', 'betty-pi-arc', 'include_unwind_tables', 'official',
+    'chromeos_betty-pi-arc_include_unwind_tables_official_use_fake_dbus_clients': [
+      'chromeos_device', 'betty-pi-arc', 'include_unwind_tables', 'official', 'use_fake_dbus_clients',
     ],
 
     'chromeos_eve-arc-r_include_unwind_tables_official': [
@@ -2962,6 +2966,10 @@
       'gn_args': 'use_dummy_lastchange=true',
     },
 
+    'use_fake_dbus_clients': {
+      'gn_args': 'use_real_dbus_clients=false',
+    },
+
     'use_java_coverage': {
       'gn_args': 'use_jacoco_coverage=true',
     },