Move the C bindings tests to the new location.

mojo/public/c/BUILD.gn

 # Copyright 2016 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("../mojo_sdk.gni")
 
 config("c_config") {
   include_dirs = [ "include" ]
 }
 
@@ skipping 41 matching lines @@
     "lib/bindings/struct.c",
     "lib/bindings/type_descriptor.c",
     "lib/bindings/union.c",
   ]
 
   deps = [
     ":system",
   ]
 }
 
+mojo_sdk_source_set("bindings_unittests") {
+  testonly = true
+
+  sources = [
+    "tests/bindings/array_unittest.cc",
+    "tests/bindings/buffer_unittest.cc",
+    "tests/bindings/message_unittest.cc",
+    "tests/bindings/struct_unittest.cc",
+    "tests/bindings/testing_util.h",
+    "tests/bindings/union_unittest.cc",
+    "tests/bindings/validation_unittest.cc",
+  ]
+
+  deps = [
+    ":bindings",
+    "//testing/gtest",
+  ]
+
+  mojo_sdk_deps = [
+    "mojo/public/cpp/bindings/tests:mojo_public_bindings_test_utils",
+    "mojo/public/cpp/bindings/tests:validation_util",
+    "mojo/public/cpp/test_support",
+    "mojo/public/cpp/system",
+
+    # The "_c" suffix'd target compiles the generated C bindings to this mojom
+    # target.
+    "mojo/public/interfaces/bindings/tests:test_interfaces_c",
+  ]
+}
+
 # common -----------------------------------------------------------------------
 
 # Headers in include/mojo (to be included as <mojo/HEADER.h>).
 #
 # Depends on nothing.
 
 mojo_sdk_source_set("common") {
   public_configs = [ ":c_config" ]
 
   sources = [
@@ skipping 125 matching lines @@
 
   cflags = [ "-Wundef" ]
 
   sources = [
     "tests/compile/pure_c.c",
     "tests/compile/pure_cpp.cc",
   ]
 
   mojo_sdk_deps = [ "mojo/public/c:environment" ]
 }