Revert of GN: Explicitly list out public headers in the blink_headers source_set (patchset #2 id:20001 of https://codereview.chromium.org/1222673004/)
Revert of GN: Explicitly list out public headers in the blink_headers source_set (patchset #2 id:20001 of https://codereview.chromium.org/1222673004/)

Reason for revert:
This patch is causing build failures:
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_gn_rel/builds/107230/steps/gn_check%20%28with%20patch%29/logs/stdio

Original issue's description:
> GN: Explicitly list out public headers in the blink_headers source_set
> 
> This enables "gn check" to enforce that source files that #include
> these headers also declare a dependency on them in GN.
> 
> This also fixes "gn check" on Android from having errors like:
> 
> ERROR at //components/autofill/content/renderer/autofill_agent.cc:45:11: Include not allowed.
>           ^--------------------------------------------
> It is not in any dependency of
>   //components/autofill/content/renderer:renderer
> The include file is in the target(s):
>   //third_party/WebKit/public:blink_headers_java_enums_srcjar__generate_enum
> which should somehow be reachable.
> 
> BUG=367595
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=198439

TBR=dpranke@chromium.org,esprehn@chromium.org,agrieve@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=367595

Review URL: https://codereview.chromium.org/1224843009

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@198520 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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