Add SurfaceSequence mojom file to cc/ipc and edit corresponding GYP file

cc/surfaces/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.
 
 source_set("surface_id") {
   sources = [
     "surface_id.h",
   ]
 
   deps = [
     "//base",
   ]
 }
 
+source_set("surface_sequence") {

[Fady Samuel, 2016/06/06 18:34:30]

Do we need this? Can't you just dep on all of surfaces?

[xlai (Olivia), 2016/06/06 19:04:32]

Same rationale as above. I think it's better to isolate surface_id and
surface_sequence, because that's all I need. Adding others may again introduce a
whole bunch of other dependent targets unnecessarily.

+  sources = [
+    "surface_sequence.h",
+  ]
+
+  deps = [
+    "//base",
+  ]
+}
+
 component("surfaces") {
   output_name = "cc_surfaces"
   sources = [
     "display.cc",
     "display.h",
     "display_client.h",
     "display_scheduler.cc",
     "display_scheduler.h",
     "onscreen_display_client.cc",
     "onscreen_display_client.h",
     "surface.cc",
     "surface.h",
     "surface_aggregator.cc",
     "surface_aggregator.h",
     "surface_display_output_surface.cc",
     "surface_display_output_surface.h",
     "surface_factory.cc",
     "surface_factory.h",
     "surface_factory_client.h",
     "surface_hittest.cc",
     "surface_hittest.h",
     "surface_hittest_delegate.h",
     "surface_id_allocator.cc",
     "surface_id_allocator.h",
     "surface_manager.cc",
     "surface_manager.h",
     "surface_resource_holder.cc",
     "surface_resource_holder.h",
+    "surface_sequence.h",
     "surfaces_export.h",
   ]
 
   defines = [ "CC_SURFACES_IMPLEMENTATION=1" ]
 
   public_deps = [
     ":surface_id",
+    ":surface_sequence",
   ]
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/command_buffer/common",
     "//skia",
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   if (is_android && !is_debug) {
     configs -= [ "//build/config/compiler:default_optimization" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 }