Create libsampler as V8 sampler library.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 8d605416d029e20d0925672c3a5621bfcaf5d97f..63a0941bf6b1d26963ad98efb3df42609e68c89c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -112,6 +112,11 @@ 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") {
@@ -1994,6 +1999,30 @@ source_set("v8_libplatform") {
   ]
 }
 
+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.