Added initial Vulkan build files as well as a basic implementation file.

content/gpu/gpu_child_thread.cc

Index: content/gpu/gpu_child_thread.cc
diff --git a/content/gpu/gpu_child_thread.cc b/content/gpu/gpu_child_thread.cc
index 3081fd120694e38bf776c91d21c0647726854f35..a37ce9bc42d27ed7e51a753db6ce190d1a085976 100644
--- a/content/gpu/gpu_child_thread.cc
+++ b/content/gpu/gpu_child_thread.cc
@@ -38,6 +38,10 @@
 #include "ui/ozone/public/ozone_platform.h"
 #endif
 
+#if defined(ENABLE_VULKAN)
+#include "gpu/vulkan/vulkan_surface.h"
+#endif
+
 namespace content {
 namespace {
 
@@ -198,6 +202,11 @@ GpuChildThread::GpuChildThread(
   gpu_info_.video_decode_accelerator_capabilities =
       content::GpuVideoDecodeAccelerator::GetCapabilities();
 
+#if defined(ENABLE_VULKAN)
+  // Temporary Vulkan initialization injection.
+  gfx::VulkanSurface::InitializeOneOff();
+#endif
+
   if (!gfx::GLSurface::InitializeOneOff())
     VLOG(1) << "gfx::GLSurface::InitializeOneOff failed";