Use NV glsl shader compiler for Vulkan

src/gpu/vk/GrVkCaps.h

Index: src/gpu/vk/GrVkCaps.h
diff --git a/src/gpu/vk/GrVkCaps.h b/src/gpu/vk/GrVkCaps.h
index 649dce791886bfd887e13e9149e4357c43b60e18..fdf5443964cd6d183e58236e12130def38f9d229 100644
--- a/src/gpu/vk/GrVkCaps.h
+++ b/src/gpu/vk/GrVkCaps.h
@@ -27,7 +27,7 @@ public:
      * be called to fill out the caps.
      */
     GrVkCaps(const GrContextOptions& contextOptions, const GrVkInterface* vkInterface,
-             VkPhysicalDevice device, uint32_t featureFlags);
+             VkPhysicalDevice device, uint32_t featureFlags, uint32_t extensionFlags);
 
     bool isConfigTexturable(GrPixelConfig config) const override {
         SkASSERT(kGrPixelConfigCnt > config);
@@ -49,6 +49,10 @@ public:
         return fConfigLinearTextureSupport[config];
     }
 
+    bool canUseGLSLForShaderModule() const {
+        return fCanUseGLSLForShaderModule;
+    }
+
     /**
      * Gets an array of legal stencil formats. These formats are not guaranteed to be supported by
      * the driver but are legal VK_TEXTURE_FORMATs.
@@ -69,7 +73,7 @@ public:
 
 private:
     void init(const GrContextOptions& contextOptions, const GrVkInterface* vkInterface,
-              VkPhysicalDevice device, uint32_t featureFlags);
+              VkPhysicalDevice device, uint32_t featureFlags, uint32_t extensionFlags);
     void initGrCaps(const VkPhysicalDeviceProperties&,
                     const VkPhysicalDeviceMemoryProperties&,
                     uint32_t featureFlags);
@@ -92,6 +96,9 @@ private:
     SkTArray<StencilFormat, true> fLinearStencilFormats;
     SkTArray<StencilFormat, true> fStencilFormats;
 
+    // Tells of if we can pass in straight GLSL string into vkCreateShaderModule
+    bool fCanUseGLSLForShaderModule;
+
     typedef GrCaps INHERITED;
 };