Reland "[DEPS] Add abseil to deps"

This is a reland of 3c49308a

Original change's description:
> [DEPS] Add abseil to deps
>
> Add a dependency on the chromium abseil-cpp subdir mirror.
>
> Bug: v8:11006
> Change-Id: Icaad757269d27c65bc368ed539f84c5bb79ee62d
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2464940
> Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Victor Gomes <victorgomes@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#70786}

Bug: v8:11006
Change-Id: I2befd2eadd11d485eee47c68119d93be9a3e1655
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2504257
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76897}

BUILD.gn

@@ -1776,6 +1776,15 @@ group("v8_maybe_icu") {
   }
 }
 
+group("v8_abseil") {
+  public_deps = [ "//third_party/abseil-cpp:absl" ]
+
+  public_configs = [
+    "//third_party/abseil-cpp:absl_define_config",
+    "//third_party/abseil-cpp:absl_include_config",
+  ]
+}
+
 v8_header_set("torque_runtime_support") {
   visibility = [ ":*" ]
 
@@ -1796,6 +1805,7 @@ v8_source_set("torque_generated_initializers") {
 
   public_deps = [
     ":torque_runtime_support",
+    ":v8_abseil",
     ":v8_maybe_icu",
   ]
 
@@ -1827,7 +1837,10 @@ v8_source_set("torque_generated_definitions") {
     ":v8_tracing",
   ]
 
-  public_deps = [ ":v8_maybe_icu" ]
+  public_deps = [
+    ":v8_abseil",
+    ":v8_maybe_icu",
+  ]
 
   sources = [
     "$target_gen_dir/torque-generated/class-forward-declarations.h",
@@ -2111,7 +2124,10 @@ v8_source_set("v8_snapshot") {
     # Also top-level visibility targets can depend on this.
     visibility += [ "//:gn_visibility" ]
 
-    public_deps += [ ":v8_maybe_icu" ]
+    public_deps += [
+      ":v8_abseil",
+      ":v8_maybe_icu",
+    ]
 
     sources += [ "$target_gen_dir/snapshot.cc" ]
   }
@@ -2289,7 +2305,10 @@ v8_source_set("v8_init") {
     "src/init/setup-isolate-full.cc",
   ]
 
-  public_deps = [ ":v8_maybe_icu" ]
+  public_deps = [
+    ":v8_abseil",
+    ":v8_maybe_icu",
+  ]
 
   configs = [ ":internal_config" ]
 }
@@ -3730,6 +3749,7 @@ v8_source_set("v8_compiler_opt") {
   public_deps = [
     ":generate_bytecode_builtins_list",
     ":run_torque",
+    ":v8_abseil",
     ":v8_maybe_icu",
     ":v8_tracing",
   ]
@@ -3762,6 +3782,7 @@ v8_source_set("v8_compiler") {
   public_deps = [
     ":generate_bytecode_builtins_list",
     ":run_torque",
+    ":v8_abseil",
     ":v8_internal_headers",
     ":v8_maybe_icu",
     ":v8_tracing",
@@ -4565,6 +4586,7 @@ v8_source_set("v8_base_without_compiler") {
     ":cppgc_base",
     ":generate_bytecode_builtins_list",
     ":run_torque",
+    ":v8_abseil",
     ":v8_headers",
     ":v8_internal_headers",
     ":v8_maybe_icu",
@@ -6092,7 +6114,10 @@ if (v8_enable_webassembly) {
       ":v8_tracing",
     ]
 
-    public_deps = [ ":v8_maybe_icu" ]
+    public_deps = [
+      ":v8_abseil",
+      ":v8_maybe_icu",
+    ]
 
     configs = [
       ":external_config",
@@ -6172,7 +6197,10 @@ if (v8_enable_webassembly) {
       ":wasm_test_common",
     ]
 
-    public_deps = [ ":v8_maybe_icu" ]
+    public_deps = [
+      ":v8_abseil",
+      ":v8_maybe_icu",
+    ]
 
     configs = [
       ":external_config",

DEPS

@@ -48,6 +48,9 @@ vars = {
   # reclient CIPD package version
   'reclient_version': 're_client_version:0.40.0.40ff5a5',
 
+  # This variable is overrided in Chromium's DEPS file.
+  'build_with_chromium': False,
+
   # GN CIPD package version.
   'gn_version': 'git_revision:69ec4fca1fa69ddadae13f9e6b7507efa0675263',
 
@@ -314,10 +317,15 @@ deps = {
       'condition': 'host_cpu != "s390" and host_os != "aix"',
       'dep_type': 'cipd',
   },
+  'third_party/abseil-cpp': {
+    'url': Var('chromium_url') + '/chromium/src/third_party/abseil-cpp.git' + '@' + '6569bfcb586ad33f3f97921a3b350046c3a2af87',
+    'condition': 'not build_with_chromium',
+  }
 }
 
 include_rules = [
   # Everybody can use some things.
+  '+absl',
   '+include',
   '+unicode',
   '+third_party/fdlibm',

tools/debug_helper/BUILD.gn

@@ -95,6 +95,7 @@ v8_component("v8_debug_helper") {
     ":gen_heap_constants",
     "../..:generate_bytecode_builtins_list",
     "../..:run_torque",
+    "../..:v8_abseil",
     "../..:v8_headers",
     "../..:v8_internal_headers",
     "../..:v8_libbase",