Autoformat everything except tests/examples

Done by:
- Appending an extra newline at the end of src/**/*.{cpp,h,mm,gn}
  except src/tests/*
- Running git cl format --full to format the full contents of every
  changed file

Bug: none
Change-Id: Id88fc5ed0c5efbbc93b2c6a305c2f98465fe646d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/24641
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>

src/include/dawn_native/VulkanBackend.h

@@ -23,6 +23,7 @@
 #include <vector>
 
 namespace dawn_native { namespace vulkan {
+
     DAWN_NATIVE_EXPORT VkInstance GetInstance(WGPUDevice device);
 
     DAWN_NATIVE_EXPORT PFN_vkVoidFunction GetInstanceProcAddr(WGPUDevice device, const char* pName);
@@ -75,6 +76,7 @@ namespace dawn_native { namespace vulkan {
         DAWN_NATIVE_EXPORT WGPUTexture WrapVulkanImage(WGPUDevice cDevice,
                                                        const ExternalImageDescriptor* descriptor);
 #endif  // __linux__
+
 }}  // namespace dawn_native::vulkan
 
 #endif  // DAWNNATIVE_VULKANBACKEND_H_