upstream cr/165303354

The only interesting difference here is that I've just skipped
cd_Documents() on Google3 iOS builds rather than adding a new target to
BUILD.  We don't run the binary so it's kind of moot what directory it'd
run in.

Change-Id: I1994e0283d24bcc505fa9b2b7b58307eafa5be92
Reviewed-on: https://skia-review.googlesource.com/34742
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 0644cc0..fa72aff 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -1291,7 +1291,7 @@
 
     initializeEventTracingForTools();
 
-#if defined(SK_BUILD_FOR_IOS)
+#if !defined(GOOGLE3) && defined(SK_BUILD_FOR_IOS)
     cd_Documents();
 #endif
     setbuf(stdout, nullptr);