Revert of Remove test result whitespace stripping from blink_gc_plugin test script

Revert of Remove test result whitespace stripping from blink_gc_plugin test script (patchset #1 id:1 of https://codereview.chromium.org/1132293003/)

Reason for revert:
This broke the blink_gc_plugin tests on Mac (I didn't try Linux yet). Reverting it solved the problem locally.

Original issue's description:
> Remove test result whitespace stripping from blink_gc_plugin test script
> 
> To make things easier for future developers, the test script now parses
> the options using argparse and provides a --reset-results flag to easily
> update the baselines.
> 
> BUG=none
> 
> Committed: https://crrev.com/5171d85366fe1bd7c1de43e866adc3c3e50bc419
> Cr-Commit-Position: refs/heads/master@{#329904}

TBR=thakis@chromium.org,dcheng@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

[hans, 2015-05-15 20:13:39]

Created Revert of Remove test result whitespace stripping from blink_gc_plugin
test script

[commit-bot: I haz the power, 2015-05-15 20:14:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1139113004/1

[commit-bot: I haz the power, 2015-05-15 20:18:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-05-15 20:18:04]

Failed to apply patch for tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt:
While running git apply --index -3 -p1;
  error: tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt: does not exist
in index

Patch:   N   tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt
Index: tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt
diff --git a/tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt
b/tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt
index
e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..8b137891791fe96927ad78e64b0aad7bded08bdc
100644
--- a/tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt
+++ b/tools/clang/blink_gc_plugin/tests/cycle_super_neg.txt
@@ -0,0 +1 @@
+

[commit-bot: I haz the power, 2015-05-15 20:19:09]

The CQ bit was unchecked by commit-bot@chromium.org

[hans, 2015-05-15 20:22:08]

Reverting manually in https://codereview.chromium.org/1131933004/