Revert of Roll Clang 223108:230914

Revert of Roll Clang 223108:230914 (patchset #1 id:1 of https://codereview.chromium.org/975503002/)

Reason for revert:
Strong suspect of redness in the trybots
see bug 463436


Original issue's description:
> Roll Clang 223108:230914
> 
> Also introduce a build number in the package name, stop versioning
> the Blink GC plugin, and remove repackage.sh.
> 
> BUG=444089
> TBR=jln, jbauman
> NOPRESUBMIT=true
> 
> Committed: https://crrev.com/c647d34565a26b73452981f86556c5bb5ec438a6
> Cr-Commit-Position: refs/heads/master@{#318797}

TBR=thakis@chromium.org,hans@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=444089

[cpu_(ooo_6.6-7.5), 2015-03-03 19:41:15]

Created Revert of Roll Clang 223108:230914

[commit-bot: I haz the power, 2015-03-03 19:42:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/976643003/1

[commit-bot: I haz the power, 2015-03-03 19:43:15]

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

[commit-bot: I haz the power, 2015-03-03 19:43:16]

Failed to apply patch for tools/clang/scripts/plugin_flags.sh:
While running git apply --index -3 -p1;
  error: tools/clang/scripts/plugin_flags.sh: does not exist in index

Patch:       tools/clang/scripts/plugin_flags.sh
Index: tools/clang/scripts/plugin_flags.sh
diff --git a/tools/clang/scripts/plugin_flags.sh
b/tools/clang/scripts/plugin_flags.sh
index
41c25c806d3db18231b6d105debd27c630155c4b..81fe0f1d6aaeb07b261f0bc9690a4020fdcd5c37
100755
--- a/tools/clang/scripts/plugin_flags.sh
+++ b/tools/clang/scripts/plugin_flags.sh
@@ -17,4 +17,6 @@
 fi
 
 echo -Xclang -load -Xclang $CLANG_LIB_PATH/libFindBadConstructs.$LIBSUFFIX \
-  -Xclang -add-plugin -Xclang find-bad-constructs
+  -Xclang -add-plugin -Xclang find-bad-constructs \
+  -Xclang -plugin-arg-find-bad-constructs -Xclang check-weak-ptr-factory-order
\
+  -Xclang -plugin-arg-find-bad-constructs -Xclang strict-virtual-specifiers

[commit-bot: I haz the power, 2015-03-03 19:43:30]

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

[Nico, 2015-03-03 19:57:20]

(the conflict is due to  https://codereview.chromium.org/966723003/ and easy to
fix)