v8: Expand is_linux to is_linux || is_chromeos.

Currently is_linux GN variable is set to true on building Chrome OS
but it is planned to be set false. This CL is the preparation to
keep the compatibility.

Bug: chromium:1110266
Test: Built locally.
Change-Id: Ibb9a57269f5a147e372fd33a473d9514379e1c68
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2405847Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69870}

BUILD.gn

@@ -187,9 +187,9 @@ declare_args() {
   # Controls the threshold for on-heap/off-heap Typed Arrays.
   v8_typed_array_max_size_in_heap = 64
 
-  v8_enable_gdbjit =
-      ((v8_current_cpu == "x86" || v8_current_cpu == "x64") &&
-       (is_linux || is_mac)) || (v8_current_cpu == "ppc64" && is_linux)
+  v8_enable_gdbjit = ((v8_current_cpu == "x86" || v8_current_cpu == "x64") &&
+                      (is_linux || is_chromeos || is_mac)) ||
+                     (v8_current_cpu == "ppc64" && (is_linux || is_chromeos))
 
   # Temporary flag to allow embedders to update their microtasks scopes
   # while rolling in a new version of V8.
@@ -342,7 +342,7 @@ assert(v8_current_cpu == "arm64" || !v8_control_flow_integrity,
 
 if (v8_enable_shared_ro_heap && v8_enable_pointer_compression) {
   assert(
-      is_linux || is_android,
+      is_linux || is_chromeos || is_android,
       "Sharing read-only heap with pointer compression is only supported on Linux or Android")
 }
 
@@ -861,7 +861,7 @@ config("toolchain") {
   # TODO(jochen): Add support for compiling with simulators.
 
   if (v8_enable_debugging_features) {
-    if (is_linux && v8_enable_backtrace) {
+    if ((is_linux || is_chromeos) && v8_enable_backtrace) {
       ldflags += [ "-rdynamic" ]
     }
 
@@ -1303,9 +1303,9 @@ template("run_torque") {
   action("run_torque" + suffix) {
     visibility = [
       ":*",
+      "test/cctest/:*",
       "tools/debug_helper/:*",
       "tools/gcmole/:*",
-      "test/cctest/:*",
     ]
 
     deps = [ ":torque($toolchain)" ]
@@ -3477,7 +3477,7 @@ v8_source_set("v8_base_without_compiler") {
 
     # iOS Xcode simulator builds run on an x64 target. iOS and macOS are both
     # based on Darwin and thus POSIX-compliant to a similar degree.
-    if (is_linux || is_mac || is_ios || target_os == "freebsd") {
+    if (is_linux || is_chromeos || is_mac || is_ios || target_os == "freebsd") {
       sources += [
         "src/trap-handler/handler-inside-posix.cc",
         "src/trap-handler/handler-inside-posix.h",
@@ -3822,7 +3822,7 @@ v8_source_set("v8_base_without_compiler") {
     libs += [ "atomic" ]
   }
 
-  if (v8_enable_vtunetracemark && (is_linux || is_win)) {
+  if (v8_enable_vtunetracemark && (is_linux || is_chromeos || is_win)) {
     sources += [
       "src/extensions/vtunedomain-support-extension.cc",
       "src/extensions/vtunedomain-support-extension.h",
@@ -4067,7 +4067,7 @@ v8_component("v8_libbase") {
     }
   }
 
-  if (is_linux) {
+  if (is_linux || is_chromeos) {
     sources += [
       "src/base/debug/stack_trace_posix.cc",
       "src/base/platform/platform-linux.cc",

gni/v8.gni

@@ -221,7 +221,7 @@ template("v8_executable") {
       configs -= invoker.remove_configs
     }
     configs += invoker.configs
-    if (is_linux) {
+    if (is_linux || is_chromeos) {
       # For enabling ASLR.
       ldflags = [ "-pie" ]
     }