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This reverts commit b6e038a7.

Reason for revert: Broke stack_tool_with_logcat_dump on WebKit Android (Nexus4): https://uberchromegw.corp.google.com/i/chromium.webkit/builders/WebKit%20Android%20%28Nexus4%29/builds/72002

Original change's description:
> Use llvm symbolizer for stack script.
> 
> llvm symbolizer is a more efficient symbolizer than addr2line, objdump,
> etc.
> 
> In this cl, I 1)created a wrapper instance to interact with
> llvm symbolizer, 2)made the stack script to use llvm symbolizer instance,
> and then 3)added llvm symbolizer into isolated inputs.
> 
> Bug: 774267
> Change-Id: I971fb808b97f3a569eb9615f99efa41e3a56f3cb
> Reviewed-on: https://chromium-review.googlesource.com/789376
> Reviewed-by: agrieve <agrieve@chromium.org>
> Reviewed-by: Dirk Pranke <dpranke@chromium.org>
> Commit-Queue: Zhiling Huang <hzl@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#521820}

TBR=dpranke@chromium.org,agrieve@chromium.org,hzl@chromium.org,bpastene@chromium.org,jbudorick@chromium.org

Change-Id: Ieebbcb9527dafd25a0fc74d2826a31162495c86e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 774267
Reviewed-on: https://chromium-review.googlesource.com/809941Reviewed-by: Derek Cheng <imcheng@chromium.org>
Commit-Queue: Derek Cheng <imcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521898}