Move GuestView layer in browser to components

components/guest_view/BUILD.gn

+# Copyright 2014 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.
+
+static_library("guest_view") {
+  output_name = "guest_view"
+  sources = [
+    "//components/guest_view/browser/guest_view.h",
+    "//components/guest_view/browser/guest_view_base.cc",
+    "//components/guest_view/browser/guest_view_base.h",
+    "//components/guest_view/browser/guest_view_event.cc",
+    "//components/guest_view/browser/guest_view_event.h",
+    "//components/guest_view/browser/guest_view_manager.cc",
+    "//components/guest_view/browser/guest_view_manager.h",
+    "//components/guest_view/browser/guest_view_manager_delegate.cc",
+    "//components/guest_view/browser/guest_view_manager_delegate.h",
+    "//components/guest_view/browser/guest_view_manager_factory.h",
+    "//components/guest_view/browser/guest_view_message_filter.cc",
+    "//components/guest_view/browser/guest_view_message_filter.h",
+    "//components/guest_view/common/guest_view_constants.cc",
+    "//components/guest_view/common/guest_view_constants.h",
+    "//components/guest_view/common/guest_view_messages.h"
+  ]
+
+  deps = [
+    "//base",
+    "//content/public/browser",
+    "//content/public/common",
+    "//third_party/WebKit/public:blink",
+  ]
+}
+
+static_library("test_support") {
+  testonly = true
+  sources = [
+    "//components/guest_view/browser/test_guest_view_manager.h",
+    "//components/guest_view/browser/test_guest_view_manager.cc",
+  ]
+
+  deps = [
+    ":guest_view",
+    "//content/test:test_support"
+  ]
+}