Enforce comment formatting in bindings/, public/

Like https://codereview.chromium.org/2390853002/ but for bindings, public.

BUG=563793
TBR=dcheng

Review-Url: https://codereview.chromium.org/2391793003
Cr-Commit-Position: refs/heads/master@{#422829}

third_party/WebKit/Source/bindings/.clang-format

+# TODO(thakis): Remove this once Source/.clang-format no longer says
+# `ReflowComments: false`.
+BasedOnStyle: Chromium
+Standard: Cpp11
+ReflowComments: true

third_party/WebKit/public/.clang-format

+# TODO(thakis): Remove this once Source/.clang-format no longer says
+# `ReflowComments: false`.
+BasedOnStyle: Chromium
+Standard: Cpp11
+ReflowComments: true