Add gpu_angle_passthrough_fuzzer.

gpu/BUILD.gn

Index: gpu/BUILD.gn
diff --git a/gpu/BUILD.gn b/gpu/BUILD.gn
index 6b0dc6cfab98c53152b17b727f29df43eb3b87e0..4a7a35d7567683f3bb9df81233e7c9cd75230058 100644
--- a/gpu/BUILD.gn
+++ b/gpu/BUILD.gn
@@ -433,4 +433,27 @@ if (is_linux) {
 
     libfuzzer_options = [ "max_len=16384" ]
   }
+
+  fuzzer_test("gpu_angle_passthrough_fuzzer") {
+    sources = [
+      "command_buffer/tests/fuzzer_main.cc",
+    ]
+
+    defines = [
+      "GPU_FUZZER_USE_ANGLE",
+      "GPU_FUZZER_USE_PASSTHROUGH_CMD_DECODER",
+    ]
+
+    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" ]
+  }
 }