Revert of Enable crash symbols unit test for Mac OSX. (patchset #4 id:60001 of...

Revert of Enable crash symbols unit test for Mac OSX. (patchset #4 id:60001 of https://codereview.chromium.org/1586143003/ )

Reason for revert:
This patch appears to be causing failures in telemetry_perf_unittests on Mac-10.9:

https://build.chromium.org/p/chromium.mac/builders/Mac10.9%20Tests%20%28dbg%29/builds/18194

Original issue's description:
> Enable crash symbols unit test for Mac OSX.
>
> R=nednguyen@google.com
> BUG=563716
>
> Committed: https://crrev.com/7dfa2f79c2fda175f1202cac8d5a51d1e64a2171
> Cr-Commit-Position: refs/heads/master@{#370745}

TBR=nednguyen@google.com,avi@chromium.org,dyen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=563716

Review URL: https://codereview.chromium.org/1616743004

Cr-Commit-Position: refs/heads/master@{#370814}

tools/perf/core/stacktrace_unittest.py

@@ -20,9 +20,9 @@ class TabStackTraceTest(tab_test_case.TabTestCase):
       self.assertIn('Thread 0 (crashed)', '\n'.join(e.stack_trace))
 
   # Currently stack traces do not work on windows: http://crbug.com/476110
+  # Currently symbols do not work on swarming: http://crbug.com/563716
   # Linux stack traces depends on fission support: http://crbug.com/405623
-  @decorators.Enabled('mac')
-  @decorators.Disabled('snowleopard')
+  @decorators.Disabled('all')
   def testCrashSymbols(self):
     try:
       self._tab.Navigate('chrome://crash', timeout=5)

tools/telemetry/telemetry/internal/backends/chrome/desktop_browser_backend.py

@@ -47,12 +47,7 @@ def GetSymbolBinary(executable, os_name):
                                     'Chromium Framework.framework',
                                     'Chromium Framework')
       if os.path.isfile(framework_file):
-        # Sometimes dyld returns symbols for a different file. Emulate what it
-        # does here by using the same mechanism to find the binary file.
-        import fcntl
-        F_GETPATH = 50
-        with open(framework_file, 'rb') as f:
-          return fcntl.fcntl(f.fileno(), F_GETPATH, b'\0' * 1024).rstrip(b'\0')
+        return framework_file
 
   return executable