Revert of [swarming] Isolate v8 testing.

Revert of [swarming] Isolate v8 testing. (patchset #8 id:140001 of https://codereview.chromium.org/1380593002/ )

Reason for revert:
Prime suspect for breaking Linux V8 - no snap

Original issue's description:
> [swarming] Isolate v8 testing.
> 
> Add gyp support and isolates for default test suites.
> Add two default isolates, one (default) for using the
> test suite collection we call "default" on the bots. One
> (developer_default) for also supporting the way developers
> call the driver (i.e. without argument, which includes
> the unittests).
> 
> BUG=chromium:535160
> LOG=n
> 
> Committed: https://crrev.com/9bd83f58f29ab0c7c5b71b00bcb1df3a9e641f05
> Cr-Commit-Position: refs/heads/master@{#31081}

TBR=tandrii@chromium.org,jochen@chromium.org,maruel@chromium.org,machenbach@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:535160

[danno, 2015-10-02 15:45:59]

Created Revert of [swarming] Isolate v8 testing.

[commit-bot: I haz the power, 2015-10-02 15:46:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1386663002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1386663002/1

[commit-bot: I haz the power, 2015-10-02 15:46:23]

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

[commit-bot: I haz the power, 2015-10-02 15:46:24]

Failed to apply patch for test/cctest/cctest.gyp:
While running git apply --index -3 -p1;
  error: patch failed: test/cctest/cctest.gyp:330
  error: repository lacks the necessary blob to fall back on 3-way merge.
  error: test/cctest/cctest.gyp: patch does not apply

Patch:       test/cctest/cctest.gyp
Index: test/cctest/cctest.gyp
diff --git a/test/cctest/cctest.gyp b/test/cctest/cctest.gyp
index
de169d1009c899f8c94c411b8bdfe01e0c879729..a7092a8bdc4ba63c86576b4061331d166264d437
100644
--- a/test/cctest/cctest.gyp
+++ b/test/cctest/cctest.gyp
@@ -330,23 +330,4 @@
       ],
     },
   ],
-  'conditions': [
-    ['test_isolation_mode != "noop"', {
-      'targets': [
-        {
-          'target_name': 'cctest_run',
-          'type': 'none',
-          'dependencies': [
-            'cctest',
-          ],
-          'includes': [
-            '../../build/isolate.gypi',
-          ],
-          'sources': [
-            'cctest.isolate',
-          ],
-        },
-      ],
-    }],
-  ],
 }

[tandrii(chromium), 2015-10-02 15:46:26]

lgtm