Adds ability to build for asan with gn

build/config/BUILDCONFIG.gn

Index: build/config/BUILDCONFIG.gn
diff --git a/build/config/BUILDCONFIG.gn b/build/config/BUILDCONFIG.gn
index 890d33e0659e0d0b9ed1bf41b5e572979742b177..533792c38c1e771b7c0c05668d18a0fd1c85ecb9 100644
--- a/build/config/BUILDCONFIG.gn
+++ b/build/config/BUILDCONFIG.gn
@@ -481,6 +481,12 @@ set_defaults("test") {
   }
 }
 
+if (is_asan) {
+  sanitizer_deps = [ "//build/sanitizers:options" ]

[brettw, 2014/10/28 16:59:13]

I think we would want this in a .gni file. But actually I had a better idea.
Just delete this and add a dep the sanitizer helper target directly. Then define
that target to be nothing when no sanitizer is enabled. I think this will look
cleaner in the deps list.

I feel like we should also change the name of the target then, so it makes the
most possible sense from the target depending on it. Maybe
//build/config/sanitizers:deps or something?

+} else {
+  sanitizer_deps = []
+}
+
 
 # ==============================================================================
 # TOOLCHAIN SETUP
@@ -568,7 +574,11 @@ template("component") {
       if (defined(invoker.data)) { data = invoker.data }
       if (defined(invoker.datadeps)) { datadeps = invoker.datadeps }
       if (defined(invoker.defines)) { defines = invoker.defines }
-      if (defined(invoker.deps)) { deps = invoker.deps }
+      if (defined(invoker.deps)) {
+        deps = invoker.deps + sanitizer_deps
+      } else {
+        deps = sanitizer_deps
+      }
       if (defined(invoker.direct_dependent_configs)) { direct_dependent_configs = invoker.direct_dependent_configs }
       if (defined(invoker.forward_dependent_configs_from)) { forward_dependent_configs_from = invoker.forward_dependent_configs_from }
       if (defined(invoker.include_dirs)) { include_dirs = invoker.include_dirs }
@@ -691,7 +701,11 @@ template("test") {
       if (defined(invoker.data)) { data = invoker.data }
       if (defined(invoker.datadeps)) { datadeps = invoker.datadeps }
       if (defined(invoker.defines)) { defines = invoker.defines }
-      if (defined(invoker.deps)) { deps = invoker.deps }
+      if (defined(invoker.deps)) {
+        deps = invoker.deps + sanitizer_deps
+      } else {
+        deps = sanitizer_deps
+      }
       if (defined(invoker.direct_dependent_configs)) { direct_dependent_configs = invoker.direct_dependent_configs }
       if (defined(invoker.forward_dependent_configs_from)) { forward_dependent_configs_from = invoker.forward_dependent_configs_from }
       if (defined(invoker.include_dirs)) { include_dirs = invoker.include_dirs }