Clean up Mojo C API dependent targets

mojo/converters/blink/BUILD.gn

 # Copyright 2015 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/test.gni")
 
 component("blink") {
   output_name = "mojo_blink_lib"
 
   sources = [
     "blink_input_events_type_converters.cc",
     "blink_input_events_type_converters.h",
     "mojo_blink_export.h",
   ]
 
   defines = [ "MOJO_CONVERTERS_BLINK_IMPLEMENTATION" ]
 
+  public_deps = [
+    "//mojo/public/cpp/bindings",
+  ]
+
   deps = [
     "//base",
-    "//mojo/public/c/system:for_component",
-    "//mojo/public/cpp/bindings:bindings",
     "//third_party/WebKit/public:blink",
     "//ui/events",
     "//ui/events:dom_keycode_converter",
   ]
 }
 
 test("blink_converters_unittests") {
   sources = [
     "blink_input_events_type_converters_unittest.cc",
   ]
   deps = [
     ":blink",
     "//base:message_loop_tests",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//mojo/edk/test:test_support",
     "//mojo/public/cpp/bindings:bindings",
     "//testing/gtest",
     "//third_party/WebKit/public:blink",
     "//ui/events",
   ]
 }