Adds ability to build for asan with gn

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index ba44d1a3ffb293b4e2a156e9f898f2b31a946dad..b80fa16a684dcda2b2c925923b406cff2c9932f0 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -45,6 +45,9 @@ config("default_include_dirs") {
   ]
 }
 
+# TODO(GYP): is_ubsan, is_ubsan_vptr
+using_sanitizer = is_asan || is_lsan || is_tsan || is_msan
+
 # compiler ---------------------------------------------------------------------
 #
 # Base compiler configuration.
@@ -103,6 +106,22 @@ config("compiler") {
       # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
       ldflags += [ "-Wl,--fatal-warnings" ]
     }
+
+    # Common options for AddressSanitizer, LeakSanitizer, ThreadSanitizer and
+    # MemorySanitizer
+    if (using_sanitizer) {
+      cflags += [
+        "-fno-omit-frame-pointer",
+        "-gline-tables-only",
+      ]
+    }
+    if (is_asan) {
+      cflags += [ "-fsanitize=address" ]
+      if (is_mac) {
+        cflags += [ "-mllvm -asan-globals=0" ]  # http://crbug.com/352073
+        # TODO(GYP): deal with mac_bundles.
+      }
+    }
   }
 
   if (is_clang && is_debug) {
@@ -814,9 +833,9 @@ if (is_win) {
   common_optimize_on_ldflags = []
 
   if (is_android) {
-    common_optimize_on_cflags += [
-      "-fomit-frame-pointer",
-    ]
+    if (!using_sanitizer) {
+      common_optimize_on_cflags += [ "-fomit-frame-pointer" ]
+    }
     common_optimize_on_ldflags += [
       # Warn in case of text relocations.
       "-Wl,--warn-shared-textrel",
@@ -874,10 +893,12 @@ config("no_optimize") {
     # much even when optimization is disabled to get the binary size down.
     cflags = [
       "-Os",
-      "-fomit-frame-pointer",
       "-fdata-sections",
       "-ffunction-sections",
     ]
+    if (!using_sanitizer) {
+      cflags += [ "-fomit-frame-pointer" ]
+    }
     ldflags = common_optimize_on_ldflags
   } else {
     cflags = [ "-O0" ]