Decompose //extensions/browser/BUILD.gn

extensions/browser/guest_view/BUILD.gn

Index: extensions/browser/guest_view/BUILD.gn
diff --git a/extensions/browser/guest_view/BUILD.gn b/extensions/browser/guest_view/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..94166632936b42149081f1ec612f542e8f87b970
--- /dev/null
+++ b/extensions/browser/guest_view/BUILD.gn
@@ -0,0 +1,19 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+source_set("guest_view") {
+  sources = [
+    "extensions_guest_view_manager_delegate.cc",
+    "extensions_guest_view_manager_delegate.h",
+    "extensions_guest_view_message_filter.cc",
+    "extensions_guest_view_message_filter.h",
+    "guest_view_events.cc",
+    "guest_view_events.h",
+  ]
+
+  deps = [
+    "//content/public/common",
+    "//skia",
+  ]
+}