Create libsampler as V8 sampler library.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 if (is_android) {
@@ skipping 94 matching lines @@
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   include_dirs = [ "." ]
 }
 
 # This config should be applied to code using the libplatform.
 config("libplatform_config") {
   include_dirs = [ "include" ]
 }
 
+# This config should be applied to code using the libsampler.
+config("libsampler_config") {
+  include_dirs = [ "include" ]
+}
+
 # This config should only be applied to code using V8 and not any V8 code
 # itself.
 config("external_config") {
   if (is_component_build) {
     defines = [
       "V8_SHARED",
       "USING_V8_SHARED",
     ]
   }
   include_dirs = [ "include" ]
@@ skipping 1862 matching lines @@
   if (!is_debug || v8_optimized_debug) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 
   deps = [
     ":v8_libbase",
   ]
 }
 
+source_set("v8_libsampler") {
+  sources = [
+    "src/libsampler/v8-sampler.cc",
+    "src/libsampler/v8-sampler.h",
+  ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+  configs += [
+    ":internal_config_base",
+    ":features",
+    ":toolchain",
+  ]
+
+  if (!is_debug || v8_optimized_debug) {
+    configs -= [ "//build/config/compiler:default_optimization" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
+
+  deps = [
+    ":v8_libbase",

[jochen (gone - plz use gerrit), 2016/05/11 08:54:40]

should also depend on v8

[lpy, 2016/05/11 20:57:30]

I can't find any target called v8 here, is it v8_base?

+  ]
+}
+
 source_set("fuzzer_support") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   sources = [
     "test/fuzzer/fuzzer-support.cc",
     "test/fuzzer/fuzzer-support.h",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
@@ skipping 243 matching lines @@
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
   configs += [
     ":internal_config",
     ":libplatform_config",
     ":features",
     ":toolchain",
   ]
 }