Make sure dSYMs are created by default for Mac sanitizer builds.

build/config/mac/symbols.gni

Index: build/config/mac/symbols.gni
diff --git a/build/config/mac/symbols.gni b/build/config/mac/symbols.gni
index 8cec6955dcebda06218744ff7abd49eb3ac36db1..2cb0b8f02354ae9c4d66247f72248502a8916124 100644
--- a/build/config/mac/symbols.gni
+++ b/build/config/mac/symbols.gni
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
+import("//build/config/sanitizers/sanitizers.gni")
 
 # This file declares arguments and configs that control whether dSYM debug
 # info is produced and whether build products are stripped.
@@ -13,14 +14,14 @@ declare_args() {
   # the //build/toolchain/mac/linker_driver.py. Enabling this will result in
   # all shared library, loadable module, and executable targets having a dSYM
   # generated.
-  enable_dsyms = is_official_build
+  enable_dsyms = (is_official_build && is_chrome_branded) || using_sanitizer
 
   # Strip symbols from linked targets by default. If this is enabled, the
   # //build/config/mac:strip_all config will be applied to all linked targets.
-  # If custom stripping paramters are required, remove that config from a
+  # If custom stripping parameters are required, remove that config from a
   # linked target and apply custom -Wcrl,strip flags. See
   # //build/toolchain/mac/linker_driver.py for more information.
-  enable_stripping = is_official_build
+  enable_stripping = is_official_build && is_chrome_branded
 }
 
 # Save unstripped copies of targets with a ".unstripped" suffix. This is