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

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 7ce05a039701fdea4ff4f327d823d31c07a7b0bf..e473095acfaa6e8a16ac200057ea80fdff917b8d 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -80,6 +80,10 @@
 #include "content/common/gpu/media/vaapi_wrapper.h"
 #endif
 
+#if defined(ENABLE_VULKAN)
+#include "ui/vulkan/vulkan_surface.h"
+#endif
+
 #if defined(SANITIZER_COVERAGE)
 #include <sanitizer/common_interface_defs.h>
 #include <sanitizer/coverage_interface.h>
@@ -288,6 +292,11 @@ int GpuMain(const MainFunctionParams& parameters) {
       gl_already_initialized = true;
     }
 
+#if defined(ENABLE_VULKAN)
+    // Temporary Vulkan initialization injection.
+    gfx::VulkanSurface::InitializeOneOff();
+#endif
+
     // Load and initialize the GL implementation and locate the GL entry points.
     bool gl_initialized =
         gl_already_initialized