Remove som GYP annotations, remove unused manifest.

ipc/BUILD.gn

Index: ipc/BUILD.gn
diff --git a/ipc/BUILD.gn b/ipc/BUILD.gn
index a7621bdde4e3a78a5d1a6a16150244576464ce74..8db818ff262319e9398d15ca5c23246b2a20b415 100644
--- a/ipc/BUILD.gn
+++ b/ipc/BUILD.gn
@@ -231,11 +231,6 @@ if (!is_ios) {
       sources += [ "ipc_send_fds_test.cc" ]
     }
 
-    # TODO(brettw) hook up Android testing.
-    #if (is_android && gtest_target_type == "shared_library") {
-    #  deps += "/testing/android/native_test.gyp:native_testNative_code"
-    #}
-
     deps = [
       ":ipc",
       ":mojom",
@@ -263,11 +258,6 @@ if (!is_ios) {
       "run_all_perftests.cc",
     ]
 
-    # TODO(brettw) hook up Android testing.
-    #if (is_android && gtest_target_type == "shared_library") {
-    #  deps += "/testing/android/native_test.gyp:native_testNative_code"
-    #}
-
     deps = [
       ":ipc",
       ":test_support",