Revert "Replace gl::trace logging with Chromium style logging"

Failing Chromium static initializers check:

FAILED linux-release-64/sizes/chrome-si/initializers: actual 8, expected 7, better lower

Possibly due to the static initializer for std::array for
the log severity types. We should change it to POD.

BUG=angleproject:1660

This reverts commit afcc41cee4ff63e7f6c9e60e55fc061adbba7dd4.

Change-Id: Ifb362a4af78542608397c7a0b19e6afe076f2cf3
Reviewed-on: https://chromium-review.googlesource.com/427235
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/Shader.cpp b/src/libANGLE/Shader.cpp
index 34f30dd..a4c6895 100644
--- a/src/libANGLE/Shader.cpp
+++ b/src/libANGLE/Shader.cpp
@@ -281,7 +281,7 @@
     if (!result)
     {
         mInfoLog = sh::GetInfoLog(compilerHandle);
-        WARN() << std::endl << mInfoLog;
+        TRACE("\n%s", mInfoLog.c_str());
         mCompiled = false;
         return;
     }