Added the Vulkan Context Provider implementation.

R=piman@chromium.org
BUG=582564 582558 582554
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1892303003

Cr-Commit-Position: refs/heads/master@{#388589}

diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index 2afc662..615c858 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn

@@ -265,6 +265,9 @@
     "output/texture_mailbox_deleter.h",
     "output/viewport_selection_bound.cc",
     "output/viewport_selection_bound.h",
+    "output/vulkan_context_provider.h",
+    "output/vulkan_in_process_context_provider.cc",
+    "output/vulkan_in_process_context_provider.h",
     "playback/clip_display_item.cc",
     "playback/clip_display_item.h",
     "playback/clip_path_display_item.cc",
@@ -562,9 +565,6 @@
 
   if (enable_vulkan) {
     sources += [
-      "output/vulkan_context_provider.h",
-      "output/vulkan_in_process_context_provider.cc",
-      "output/vulkan_in_process_context_provider.h",
       "output/vulkan_renderer.cc",
       "output/vulkan_renderer.h",
     ]