Add GN buildfiles for ui/compositor and snapshot.

ui/compositor/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.
+
+import("//build/config/ui.gni")
+
+component("compositor") {
+  sources = [
+    "compositor.cc",
+    "compositor.h",
+    "compositor_export.h",
+    "compositor_observer.h",
+    "compositor_vsync_manager.cc",
+    "compositor_vsync_manager.h",
+    "compositor_switches.cc",
+    "compositor_switches.h",
+    "debug_utils.cc",
+    "debug_utils.h",
+    "dip_util.cc",
+    "dip_util.h",
+    "float_animation_curve_adapter.cc",
+    "float_animation_curve_adapter.h",
+    "layer.cc",
+    "layer.h",
+    "layer_animation_delegate.h",
+    "layer_animation_element.cc",
+    "layer_animation_element.h",
+    "layer_animation_observer.cc",
+    "layer_animation_observer.h",
+    "layer_animation_sequence.cc",
+    "layer_animation_sequence.h",
+    "layer_animator.cc",
+    "layer_animator.h",
+    "layer_delegate.h",
+    "layer_owner.cc",
+    "layer_owner.h",
+    "layer_tree_owner.cc",
+    "layer_tree_owner.h",
+    "layer_type.h",
+    "reflector.h",
+    "scoped_animation_duration_scale_mode.cc",
+    "scoped_animation_duration_scale_mode.h",
+    "scoped_layer_animation_settings.cc",
+    "scoped_layer_animation_settings.h",
+    "transform_animation_curve_adapter.cc",
+    "transform_animation_curve_adapter.h",
+  ]
+
+  defines = [ "COMPOSITOR_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+    "//base/third_party/dynamic_annotations",
+    "//cc",
+    "//gpu/command_buffer/common",
+    "//skia",
+    "//ui/gfx",
+    "//ui/gfx/geometry",
+    "//ui/gl",
+  ]
+
+  if (is_win && use_aura) {
+    # TODO(sky): before we make this real need to remove
+    # IDR_BITMAP_BRUSH_IMAGE.
+    deps += [
+      "//ui/resources",
+      "//third_party/angle:libEGL",
+      "//third_party/angle:libGLESv2",
+    ]
+  }
+}
+
+source_set("test_support") {

[jamesr, 2014/05/30 03:32:10]

why a source_set instead of a static lib target? what's the difference here?

+  sources = [
+    "test/context_factories_for_test.cc",
+    "test/context_factories_for_test.h",
+    "test/draw_waiter_for_test.cc",
+    "test/draw_waiter_for_test.h",
+    "test/in_process_context_factory.cc",
+    "test/in_process_context_factory.h",
+    "test/layer_animator_test_controller.cc",
+    "test/layer_animator_test_controller.h",
+    "test/test_compositor_host.h",
+    "test/test_compositor_host_mac.mm",
+    "test/test_compositor_host_ozone.cc",
+    "test/test_compositor_host_win.cc",
+    "test/test_compositor_host_x11.cc",
+    "test/test_layer_animation_delegate.cc",
+    "test/test_layer_animation_delegate.h",
+    "test/test_layer_animation_observer.cc",
+    "test/test_layer_animation_observer.h",
+    "test/test_layers.cc",
+    "test/test_layers.h",
+    "test/test_suite.cc",
+    "test/test_suite.h",
+    "test/test_utils.cc",
+    "test/test_utils.h",
+  ]
+
+  deps = [
+    ":compositor",
+    "//base",
+    "//cc",
+    "//cc:test_support",
+    "//skia",
+    "//testing/gtest",
+    #"//third_party/WebKit/public:blink_minimal",  TODO(GYP)
+    "//ui/base",
+    "//ui/gfx",
+    "//ui/gfx/geometry",
+    "//ui/gl",
+    #'<(DEPTH)/webkit/common/gpu/webkit_gpu.gyp:webkit_gpu',  TODO(GYP)
+  ]
+
+  if (use_x11) {
+    configs += [ "//build/config/linux:x11" ]
+    deps += [ "//ui/gfx:gfx_x11" ]
+  }
+}
+
+# TODO(GYP) enable this when all dependencies are complete and it links.
+#test("compositor_unittests") {
+#  sources = [
+#    "layer_animation_element_unittest.cc",
+#    "layer_animation_sequence_unittest.cc",
+#    "layer_animator_unittest.cc",
+#    "layer_owner_unittest.cc",
+#    "layer_unittest.cc",
+#    "run_all_unittests.cc",
+#    "transform_animation_curve_adapter_unittest.cc",
+#  ]
+#
+#  deps = [
+#    ":compositor",
+#    ":test_support",
+#    "//base",
+#    "//base/allocator",
+#    "//base/test:test_support",
+#    "//cc",
+#    "//cc:test_support",
+#    "//skia",
+#    "//testing/gtest",
+#    "//ui/base",
+#    "//ui/gfx",
+#    "//ui/gfx/geometry",
+#    "//ui/gl",
+#    "//ui/resources",
+#  ]
+#
+#  if (is_linux) {
+#    #deps += [ "//third_party/mesa:osmesa" ]  # TODO(GYP)
+#  }
+#}