Remove compiler_tests.gypi and preprocessor_tests.gypi.

src/tests/compiler_tests/compiler_tests.gypi

-# Copyright (c) 2015 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.
-
-{
-    'sources':
-    [
-        'API_test.cpp',
-        'BuiltInFunctionEmulator_test.cpp',
-        'CollectVariables_test.cpp',
-        'ConstantFolding_test.cpp',
-        'DebugShaderPrecision_test.cpp',
-        'ExpressionLimit_test.cpp',
-        'MalformedShader_test.cpp',
-        'NV_draw_buffers_test.cpp',
-        'Pack_Unpack_test.cpp',
-        'PruneUnusedFunctions_test.cpp',
-        'RecordConstantPrecision_test.cpp',
-        'RemovePow_test.cpp',
-        'ShaderExtension_test.cpp',
-        'ShaderVariable_test.cpp',
-        'TypeTracking_test.cpp',
-        'UnrollFlatten_test.cpp',
-        'VariablePacker_test.cpp',
-        '../test_utils/compiler_test.cpp',
-        '../test_utils/compiler_test.h',
-    ],
-}

src/tests/preprocessor_tests/preprocessor_tests.gypi

-# Copyright (c) 2014 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.
-
-{
-    'sources':
-    [
-        'PreprocessorTest.cpp',
-        'PreprocessorTest.h',
-        'char_test.cpp',
-        'comment_test.cpp',
-        'define_test.cpp',
-        'error_test.cpp',
-        'extension_test.cpp',
-        'identifier_test.cpp',
-        'if_test.cpp',
-        'input_test.cpp',
-        'location_test.cpp',
-        'number_test.cpp',
-        'operator_test.cpp',
-        'pragma_test.cpp',
-        'space_test.cpp',
-        'token_test.cpp',
-        'version_test.cpp',
-    ],
-}