Componentize html_viewer's MessagePort

components/message_port/BUILD.gn

Index: components/message_port/BUILD.gn
diff --git a/components/printing/common/BUILD.gn b/components/message_port/BUILD.gn
similarity index 54%
copy from components/printing/common/BUILD.gn
copy to components/message_port/BUILD.gn
index d56e4e2b80f6bae0e5abbbb945b134cf98c8173e..3a81750d4a74fa373a908aaf45d7d28565b50b45 100644
--- a/components/printing/common/BUILD.gn
+++ b/components/message_port/BUILD.gn
@@ -2,18 +2,16 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-static_library("printing_common") {
+source_set("message_port") {
   sources = [
-    "print_messages.cc",
-    "print_messages.h",
-    "printing_param_traits_macros.h",
+    "web_message_port_channel_impl.cc",
+    "web_message_port_channel_impl.h",
   ]
 
-  deps = [
+  public_deps = [
     "//base",
-    "//ipc",
-    "//printing",
+    "//mojo/common",
     "//third_party/WebKit/public:blink",
-    "//ui/gfx",
+    "//third_party/mojo/src/mojo/public/cpp/system",
   ]
 }