Lacros: Preparation for lacros target_os switch.

This is a mechanical change replacing defined(OS_CHROMEOS) with
BUILDFLAG(IS_CHROMEOS_ASH) and adding BUILDFLAG(IS_CHROMEOS_LACROS) to
defined(OS_LINUX) to ensure switching lacros' target_os from linux to
chromeos does not affect the lacros binary.

It also renames chromeos_is_browser_only with is_chromeos_lacros which
was a gn var introduced to be used in place of chromeos_is_browser_only.

More detail on http://go/lacros-macros.

Bug: 1052397
Change-Id: I7e3e5685549c2b8c655a788a9fe827805988b11d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2628711
Commit-Queue: Yuta Hijikata <ythjkt@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843958}

components/autofill_assistant/browser/BUILD.gn

@@ -246,6 +246,7 @@ static_library("browser") {
   deps = [
     ":proto",
     "//base",
+    "//build:chromeos_buildflags",
     "//components/autofill/content/browser",
     "//components/autofill/core/browser",
     "//components/autofill/core/common",

components/cast_channel/cast_message_util.cc

@@ -12,6 +12,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 #include "components/cast_channel/cast_auth_util.h"
 #include "components/cast_channel/enum_table.h"
 #include "third_party/openscreen/src/cast/common/channel/proto/cast_channel.pb.h"
@@ -165,9 +166,9 @@ int GetVirtualConnectPlatformValue() {
   return 3;
 #elif defined(OS_APPLE)
   return 4;
-#elif defined(OS_CHROMEOS)
+#elif BUILDFLAG(IS_CHROMEOS_ASH)
   return 5;
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
   return 6;
 #else
   return 0;

components/enterprise/browser/reporting/report_generator.cc

@@ -59,7 +59,7 @@ void ReportGenerator::CreateBasicRequest(
 #if defined(OS_IOS)
     basic_request->set_device_model(policy::GetDeviceModel());
 #endif  // defined(OS_IOS)
-#endif  // defined(OS_CHROMEOS)
+#endif  // BUILDFLAG(IS_CHROMEOS_ASH)
   }
 
   browser_report_generator_.Generate(

components/exo/BUILD.gn

@@ -359,10 +359,6 @@ test("exo_unittests") {
     deps += [ "//components/exo/wayland:unit_tests" ]
   }
 
-  if (is_chromeos) {
-    deps += [ "//components/exo/server:unit_tests" ]
-  }
-
   if (is_chromeos_ash) {
     sources += [
       "../../ash/test/ash_test_suite.cc",
@@ -372,6 +368,7 @@ test("exo_unittests") {
     deps += [
       "//ash:test_support",
       "//ash/public/cpp",
+      "//components/exo/server:unit_tests",
     ]
 
     data_deps += [

components/payments/core/BUILD.gn

@@ -83,6 +83,7 @@ static_library("core") {
     ":error_strings",
     ":method_strings",
     "//base",
+    "//build:chromeos_buildflags",
     "//components/autofill/core/browser",
     "//components/keyed_service/core",
     "//components/link_header_util",

components/payments/core/features.cc

@@ -5,6 +5,7 @@
 #include "components/payments/core/features.h"
 
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 
 namespace payments {
 namespace features {
@@ -44,11 +45,11 @@ const base::Feature kWebPaymentsRedactShippingAddress{
 
 const base::Feature kAppStoreBilling {
   "AppStoreBilling",
-#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+#if defined(OS_ANDROID) || BUILDFLAG(IS_CHROMEOS_ASH)
       base::FEATURE_ENABLED_BY_DEFAULT
 #else
       base::FEATURE_DISABLED_BY_DEFAULT
-#endif  // OS_ANDROID || OS_CHROMEOS
+#endif  // OS_ANDROID || BUILDFLAG(IS_CHROMEOS_ASH)
 };
 
 const base::Feature kAppStoreBillingDebug{"AppStoreBillingDebug",

components/policy/core/common/BUILD.gn

@@ -189,7 +189,7 @@ source_set("internal") {
     "//url",
   ]
 
-  if (chromeos_is_browser_only) {
+  if (is_chromeos_lacros) {
     sources += [
       "policy_loader_lacros.cc",
       "policy_loader_lacros.h",

components/update_client/update_query_params.cc

@@ -34,7 +34,7 @@ const char kOs[] =
     "android";
 #elif BUILDFLAG(IS_CHROMEOS_ASH) || BUILDFLAG(IS_CHROMEOS_LACROS)
     "cros";
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
     "linux";
 #elif defined(OS_FUCHSIA)
     "fuchsia";

components/variations/service/variations_service.cc

@@ -114,7 +114,8 @@ std::string GetPlatformString() {
   return "android";
 #elif defined(OS_FUCHSIA)
   return "fuchsia";
-#elif defined(OS_LINUX) || defined(OS_BSD) || defined(OS_SOLARIS)
+#elif (defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)) || \
+    defined(OS_BSD) || defined(OS_SOLARIS)
   // Default BSD and SOLARIS to Linux to not break those builds, although these
   // platforms are not officially supported by Chrome.
   return "linux";