Remove const_cast from VulkanInProcessContextProvider

Skia's API is fixed to take be compatible with a const
VkPhysicalDeviceFeatures.

Change-Id: I5a38c1aeeace1788b1b46914c2201e56013bf6f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1650031
Auto-Submit: Saman Sami <samans@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Saman Sami <samans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#667295}

components/viz/common/gpu/vulkan_in_process_context_provider.cc

@@ -80,10 +80,7 @@ bool VulkanInProcessContextProvider::Initialize() {
                      device_extensions.size(), device_extensions.data());
   backend_context.fVkExtensions = &gr_extensions;
 
-  // TODO(samans): Get rid of the const_cast once GrVkBackendTexture is updated
-  // to take a const value.
-  backend_context.fDeviceFeatures = const_cast<VkPhysicalDeviceFeatures*>(
-      &device_queue_->enabled_device_features());
+  backend_context.fDeviceFeatures = &device_queue_->enabled_device_features();
   backend_context.fGetProc = get_proc;
 
   gr_context_ = GrContext::MakeVulkan(backend_context);