Add GN rules for forwarder2 and chromium_commands

tools/android/common/BUILD.gn

Index: tools/android/common/BUILD.gn
diff --git a/third_party/libwebm/BUILD.gn b/tools/android/common/BUILD.gn
similarity index 54%
copy from third_party/libwebm/BUILD.gn
copy to tools/android/common/BUILD.gn
index e3fd78bbd26b46fac03b3c6e66688e4c17f2efd6..dee127b5a8c75369dee519c2974bba2d1784100b 100644
--- a/third_party/libwebm/BUILD.gn
+++ b/tools/android/common/BUILD.gn
@@ -2,15 +2,22 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("libwebm") {
+# GYP version tools/android/common.gyp:android_tools_common
+source_set("common") {
   sources = [
-    "source/mkvmuxer.cpp",
-    "source/mkvmuxerutil.cpp",
-    "source/mkvwriter.cpp",
+    "adb_connection.cc",
+    "adb_connection.h",
+    "daemon.cc",
+    "daemon.h",
+    "net.cc",
+    "net.h",
+  ]
+
+  include_dirs = [
+    "..",
+    "../..",
   ]
 
-  # mkvmuxerutil.cpp redefines the _CRT_RAND_S macro. This is the only thing
-  # that blocks this target from using Chromium compiler settings.
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 }