Add a simple browser UI (with url bar)

mandoline/ui/aura/BUILD.gn

Index: mandoline/ui/aura/BUILD.gn
diff --git a/mandoline/ui/aura/BUILD.gn b/mandoline/ui/aura/BUILD.gn
index df7a0ad018e65c693ab6884f68c8bb1a80af1485..25b6195dc1a516f5044384ecb0cd8ce7c69a3b03 100644
--- a/mandoline/ui/aura/BUILD.gn
+++ b/mandoline/ui/aura/BUILD.gn
@@ -7,6 +7,8 @@ source_set("aura") {
   sources = [
     "aura_init.cc",
     "aura_init.h",
+    "input_method_mandoline.cc",
+    "input_method_mandoline.h",
     "native_widget_view_manager.cc",
     "native_widget_view_manager.h",
     "screen_mojo.cc",
@@ -19,13 +21,6 @@ source_set("aura") {
     "window_tree_host_mojo.h",
   ]
 
-  if (is_linux) {
-    sources += [
-      "input_method_mojo_linux.cc",
-      "input_method_mojo_linux.h",
-    ]
-  }
-
   public_deps = [
     "//components/view_manager/public/cpp",
   ]
@@ -42,6 +37,7 @@ source_set("aura") {
     "//skia",
     "//mojo/cc",
     "//mojo/converters/geometry",
+    "//mojo/converters/input_events",
     "//mojo/converters/surfaces",
     "//third_party/mojo/src/mojo/public/c/gles2",
     "//third_party/mojo/src/mojo/public/cpp/application",
@@ -54,9 +50,4 @@ source_set("aura") {
     "//ui/gl",
     "//ui/views",
   ]
-
-  data_deps = [
-    "//components/native_viewport",
-    "//components/surfaces",
-  ]
 }