Lacros: Preparation for lacros target_os switch.

This is a mechanical change 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.

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

Bug: 1052397
Change-Id: Ia047bcc761acac4773b8d62930771e89cb6d8c09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2628870
Commit-Queue: Yuta Hijikata <ythjkt@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843948}

weblayer/BUILD.gn

@@ -363,6 +363,7 @@ source_set("weblayer_lib_base") {
     "//base",
     "//base:base_static",
     "//base/third_party/dynamic_annotations",
+    "//build:chromeos_buildflags",
     "//cc",
     "//components/autofill/content/browser",
     "//components/autofill/content/renderer",

weblayer/app/content_main_delegate_impl.cc

@@ -14,6 +14,7 @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 #include "components/startup_metric_utils/browser/startup_metric_utils.h"
 #include "content/public/browser/browser_main_runner.h"
 #include "content/public/common/content_features.h"
@@ -218,7 +219,11 @@ bool ContentMainDelegateImpl::ShouldCreateFeatureList() {
 }
 
 void ContentMainDelegateImpl::PreSandboxStartup() {
-#if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(ARCH_CPU_ARM_FAMILY) &&              \
+    (defined(OS_ANDROID) || defined(OS_LINUX) || \
+     BUILDFLAG(IS_CHROMEOS_LACROS))
   // Create an instance of the CPU class to parse /proc/cpuinfo and cache
   // cpu_brand info.
   base::CPU cpu_info;

weblayer/browser/browser_main_parts_impl.cc

@@ -12,6 +12,7 @@
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 #include "cc/base/switches.h"
 #include "components/captive_portal/core/buildflags.h"
 #include "components/prefs/pref_service.h"
@@ -69,7 +70,9 @@
 #include "ui/base/ui_base_features.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"  // nogncheck
 #endif
-#if defined(USE_AURA) && defined(OS_LINUX)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(USE_AURA) && (defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS))
 #include "ui/base/ime/init/input_method_initializer.h"
 #endif
 
@@ -184,7 +187,9 @@ void BrowserMainPartsImpl::PreMainMessageLoopStart() {
 int BrowserMainPartsImpl::PreEarlyInitialization() {
   browser_process_ = std::make_unique<BrowserProcess>(std::move(local_state_));
 
-#if defined(USE_AURA) && defined(OS_LINUX)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(USE_AURA) && (defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS))
   ui::InitializeInputMethodForTesting();
 #endif
 #if defined(OS_ANDROID)

weblayer/browser/content_browser_client_impl.cc

@@ -16,6 +16,7 @@
 #include "base/strings/string_piece.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 #include "components/autofill/content/browser/content_autofill_driver_factory.h"
 #include "components/blocked_content/popup_blocker.h"
 #include "components/captive_portal/core/buildflags.h"
@@ -135,7 +136,9 @@
 #include "weblayer/browser/weblayer_factory_impl_android.h"
 #endif
 
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS) || defined(OS_ANDROID)
 #include "content/public/common/content_descriptors.h"
 #endif
 
@@ -387,7 +390,9 @@ void ContentBrowserClientImpl::ConfigureNetworkContextParams(
 
 void ContentBrowserClientImpl::OnNetworkServiceCreated(
     network::mojom::NetworkService* network_service) {
-#if defined(OS_LINUX)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
   network::mojom::CryptConfigPtr config = network::mojom::CryptConfig::New();
   content::GetNetworkService()->SetCryptConfig(std::move(config));
 #endif
@@ -847,7 +852,9 @@ SafeBrowsingService* ContentBrowserClientImpl::GetSafeBrowsingService() {
 }
 #endif
 
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS) || defined(OS_ANDROID)
 void ContentBrowserClientImpl::GetAdditionalMappedFilesForChildProcess(
     const base::CommandLine& command_line,
     int child_process_id,

weblayer/browser/content_browser_client_impl.h

@@ -12,6 +12,7 @@
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 #include "content/public/browser/content_browser_client.h"
 #include "services/service_manager/public/cpp/binder_registry.h"
 
@@ -116,12 +117,15 @@ class ContentBrowserClientImpl : public content::ContentBrowserClient {
   void RenderProcessWillLaunch(content::RenderProcessHost* host) override;
   scoped_refptr<content::QuotaPermissionContext> CreateQuotaPermissionContext()
       override;
-#if defined(OS_LINUX) || defined(OS_ANDROID)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS) || defined(OS_ANDROID)
   void GetAdditionalMappedFilesForChildProcess(
       const base::CommandLine& command_line,
       int child_process_id,
       content::PosixFileDescriptorInfo* mappings) override;
-#endif  // defined(OS_LINUX) || defined(OS_ANDROID)
+#endif  // defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS) ||
+        // defined(OS_ANDROID)
   void AppendExtraCommandLineSwitches(base::CommandLine* command_line,
                                       int child_process_id) override;
 #if defined(OS_ANDROID)

weblayer/browser/system_network_context_manager.cc

@@ -5,6 +5,7 @@
 #include "weblayer/browser/system_network_context_manager.h"
 
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 #include "components/variations/net/variations_http_headers.h"
 #include "content/public/browser/network_service_instance.h"
 #include "services/network/public/cpp/shared_url_loader_factory.h"
@@ -64,10 +65,13 @@ void SystemNetworkContextManager::ConfigureDefaultNetworkContextParams(
     network::mojom::NetworkContextParams* network_context_params,
     const std::string& user_agent) {
   network_context_params->user_agent = user_agent;
-#if defined(OS_LINUX) || defined(OS_WIN)
+// TODO(crbug.com/1052397): Revisit once build flag switch of lacros-chrome is
+// complete.
+#if defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS) || defined(OS_WIN)
   // We're not configuring the cookie encryption on these platforms yet.
   network_context_params->enable_encrypted_cookies = false;
-#endif  // defined(OS_LINUX) || defined(OS_WIN)
+#endif  // (defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)) ||
+        // defined(OS_WIN)
 }
 
 SystemNetworkContextManager::SystemNetworkContextManager(

weblayer/common/weblayer_paths.cc

@@ -9,6 +9,7 @@
 #include "base/path_service.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/path_utils.h"
@@ -17,7 +18,7 @@
 
 #if defined(OS_WIN)
 #include "base/base_paths_win.h"
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
 #include "base/nix/xdg_util.h"
 #endif
 
@@ -35,7 +36,7 @@ bool GetDefaultUserDataDirectory(base::FilePath* result) {
     return false;
   *result = result->AppendASCII("weblayer");
   return true;
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || BUILDFLAG(IS_CHROMEOS_LACROS)
   std::unique_ptr<base::Environment> env(base::Environment::Create());
   base::FilePath config_dir(base::nix::GetXDGDirectory(
       env.get(), base::nix::kXdgConfigHomeEnvVar, base::nix::kDotConfigDir));