Added Vulkan Shader Modules with GLSL->SPIR-V translation.

gpu/vulkan/BUILD.gn

Index: gpu/vulkan/BUILD.gn
diff --git a/gpu/vulkan/BUILD.gn b/gpu/vulkan/BUILD.gn
index e5b2519ddf05413a3c99170b4d5815569786343a..2b4fb9743d150305df84c7ba2a953786c1ec121f 100644
--- a/gpu/vulkan/BUILD.gn
+++ b/gpu/vulkan/BUILD.gn
@@ -30,6 +30,8 @@ if (enable_vulkan) {
         "vulkan_platform.h",
         "vulkan_render_pass.cc",
         "vulkan_render_pass.h",
+        "vulkan_shader_module.cc",
+        "vulkan_shader_module.h",
         "vulkan_surface.cc",
         "vulkan_surface.h",
         "vulkan_swap_chain.cc",
@@ -67,7 +69,10 @@ if (enable_vulkan) {
 
   test("vulkan_tests") {
     sources = [
+      "tests/basic_vulkan_test.cc",
+      "tests/basic_vulkan_test.h",
       "tests/native_window.h",
+      "tests/shader_module_unittest.cc",
       "tests/vulkan_test.cc",
       "tests/vulkan_tests_main.cc",
     ]