Remove EGLThreadTest to fix angle_end2end_tests failures on Android.

EGLThreadTest doesn't clean up well and the test framework can't handle
it well. It caused test failures related to eglMakeCurrent (ELG_BAD_ACCESS)
on Android that were masked by retries.

Calling eglGetDisplay within a test can cause it to return a cached
display from the test runner.  The test is unable to know if it should
terminate this display.

bug: angleproject:3321
Change-Id: I14a539a00acaed4ee71622e7416a6c7a75596606
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1541717
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/tests/angle_end2end_tests.gni

@@ -138,7 +138,6 @@ angle_end2end_tests_sources = [
   "egl_tests/EGLSurfacelessContextTest.cpp",
   "egl_tests/EGLSurfaceTest.cpp",
   "egl_tests/EGLSyncTest.cpp",
-  "egl_tests/EGLThreadTest.cpp",
   "test_utils/ANGLETest.cpp",
   "test_utils/ANGLETest.h",
   "test_utils/MultiviewTest.cpp",

src/tests/egl_tests/EGLThreadTest.cpp

@@ -1,47 +0,0 @@
-//
-// Copyright 2018 The ANGLE Project Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-//
-// EGLThreadTest.h: Tests multi-threaded uses of EGL.
-
-#include <gtest/gtest.h>
-
-#include "test_utils/ANGLETest.h"
-#include "util/system_utils.h"
-
-#include <thread>
-
-class EGLThreadTest : public EGLTest
-{
-  public:
-    void threadingTest();
-
-  protected:
-    EGLDisplay mDisplay = EGL_NO_DISPLAY;
-};
-
-void EGLThreadTest::threadingTest()
-{
-    mDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-
-    EXPECT_TRUE(mDisplay != EGL_NO_DISPLAY);
-
-    eglInitialize(mDisplay, nullptr, nullptr);
-    eglGetCurrentContext();
-}
-
-// Test a bug in our EGL TLS implementation.
-TEST_F(EGLThreadTest, ThreadInitCrash)
-{
-    std::thread runner(&EGLThreadTest::threadingTest, this);
-
-    // wait for signal from thread
-    runner.join();
-
-    // crash, because the TLS value is NULL on main thread
-    eglGetCurrentSurface(EGL_DRAW);
-    eglGetCurrentContext();
-
-    eglTerminate(mDisplay);
-}