Enable gpu_fuzzer_angle for Linux only.

gpu/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//build/config/ui.gni")
 
 config("gpu_implementation") {
   defines = [ "GPU_IMPLEMENTATION" ]
@@ skipping 384 matching lines @@
     "//base/third_party/dynamic_annotations",
     "//gpu/command_buffer/common:gles2_utils",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 
   libfuzzer_options = [ "max_len=16384" ]
 }
 
-fuzzer_test("gpu_fuzzer_angle") {
-  sources = [
-    "command_buffer/tests/fuzzer_main.cc",
-  ]
+if (is_linux) {
+  fuzzer_test("gpu_fuzzer_angle") {
+    sources = [
+      "command_buffer/tests/fuzzer_main.cc",
+    ]
 
-  defines = [ "GPU_FUZZER_USE_ANGLE" ]
+    defines = [ "GPU_FUZZER_USE_ANGLE" ]
 
-  deps = [
-    ":gpu",
-    "//base",
-    "//base/third_party/dynamic_annotations",
-    "//gpu/command_buffer/common:gles2_utils",
-    "//ui/gfx/geometry",
-    "//ui/gl",
-    "//ui/gl:test_support",
-  ]
+    deps = [
+      ":gpu",
+      "//base",
+      "//base/third_party/dynamic_annotations",
+      "//gpu/command_buffer/common:gles2_utils",
+      "//ui/gfx/geometry",
+      "//ui/gl",
+      "//ui/gl:test_support",
+    ]
 
-  libfuzzer_options = [ "max_len=16384" ]
+    libfuzzer_options = [ "max_len=16384" ]
+  }
 }