Add chrome/browser/ui to the GN build.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 94e851d3f6b83cab9386c9e283249d5844224eb1..30bce5a7feb417337fb0a23be8a58f17ba004fb7 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -20,7 +20,9 @@ group("root") {
     #"//base(//build/toolchain/nacl:x86_newlib)",
 
     "//cc",
+    "//chrome/browser",
     "//chrome/browser/devtools",
+    "//chrome/browser/ui",
     "//chrome/browser/ui/views",
     "//chrome/common",
     "//chrome/plugin",
@@ -137,7 +139,9 @@ group("root") {
   if (is_android) {
     deps -= [
       "//cc",
+      "//chrome/browser",  # Blocked on content.
       "//chrome/browser/devtools",  # Blocked on content.
+      "//chrome/browser/ui",  # Blocked on content.
       "//chrome/browser/ui/views",  # Blocked on content.
       "//chrome/common",  # Blocked on content.
       "//chrome/plugin",  # Blocked on content.