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Due to a bug, the Clang-plugin style checker failed to warn about
inline constructors, destructors, non-empty virtual methods, etc.
for nested classes.

The plugin has been fixed, and this patch is part of a clean-up of all
the code that now causes the plugin to issue errors.

BUG=139346


Review URL: https://chromiumcodereview.appspot.com/10855076

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150913 0039d316-1c4b-4281-b951-d872f2087c98