Revert of Ensure that builders that use goma strip absolute paths by default....

Revert of Ensure that builders that use goma strip absolute paths by default. (patchset #1 id:1 of https://codereview.chromium.org/2837863005/ )

Reason for revert:
Reverting in case this is related to the goma errors in https://crbug.com/716089

Original issue's description:
> Ensure that builders that use goma strip absolute paths by default.
>
> This CL tweaks the MB configs so that any builder that is using goma
> also sets strip_absolute_paths_from_debug_symbols_by_default=true.
> This helps ensure that we get the best goma cache hit rate possible.
> We don't just make the default equal to use_goma=true because doing
> so may make it harder for devs to debug binaries, and we want devs
> to be able to both debug binaries and use goma by default; the
> tradeoff is that their builds are slightly slower.
>
> R=thakis@chromium.org, jochen@chromium.org
> BUG=603286, 712790
>
> Review-Url: https://codereview.chromium.org/2837863005
> Cr-Commit-Position: refs/heads/master@{#467574}
> Committed: https://chromium.googlesource.com/chromium/src/+/050dbe550d14e99ad4e83093d4f4e79642b9edc3

TBR=jochen@chromium.org,thakis@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=603286, 712790

Review-Url: https://codereview.chromium.org/2843403004
Cr-Commit-Position: refs/heads/master@{#467769}

build/config/compiler/BUILD.gn

@@ -94,9 +94,7 @@ declare_args() {
   # branches)
   optimize_for_fuzzing = false
 
-  # Optimize symbol files for maximizing goma cache hit rate. This isn't
-  # on by default when goma is enabled because setting this to true may make
-  # it harder to debug binaries.
+  # Optimize symbol files for maximizing goma cache hit rate.
   strip_absolute_paths_from_debug_symbols = false
 }
 

tools/mb/mb_config.pyl

@@ -1729,10 +1729,7 @@
     'goma': {
       # The MB code will properly escape goma_dir if necessary in the GYP
       # code path; the GN code path needs no escaping.
-      # We also set strip_absolute_paths to ensure that we can get deterministic
-      # builds. This isn't just on by default when goma is on so that devs
-      # can do goma builds but still be able to debug by default.
-      'gn_args': 'use_goma=true strip_absolute_paths_from_debug_symbols=true',
+      'gn_args': 'use_goma=true',
     },
 
     'gpu_fyi_tests': {
@@ -1783,7 +1780,7 @@
     },
 
     'minimal_symbols': {
-      'gn_args': 'symbol_level=1',
+      'gn_args': 'symbol_level=1 strip_absolute_paths_from_debug_symbols=true',
     },
 
     'mipsel': {