Use __builtin_trap() for IMMEDIATE_CRASH() if COMPILER(CLANG) too.
Use __builtin_trap() for IMMEDIATE_CRASH() if COMPILER(CLANG) too.

In release builds, RELEASE_ASSERT(false) turns into IMMEDIATE_CRASH().
Therefore, to build with -Winvalid-noreturn, IMMEDIATE_CRASH() must
never return. This changes IMMEDIATE_CRASH() to use __builtin_trap()
with Clang on Windows so it can tell that RELEASE_ASSERT(false) can
never return.

BUG=504698

Review URL: https://codereview.chromium.org/1216123003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@198281 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk,Pluto-tv/blink-crosswalk