Use typed integers for the ExecutionSerial

This will prevent mixing it up with other serial types in the future.

Bug: dawn:442
Change-Id: I74e964708acc62eb0f33127cc48f1b9a7b171d11
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/28923
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>

src/dawn_native/DynamicUploader.cpp

@@ -29,7 +29,7 @@ namespace dawn_native {
     }
 
     ResultOrError<UploadHandle> DynamicUploader::AllocateInternal(uint64_t allocationSize,
-                                                                  Serial serial) {
+                                                                  ExecutionSerial serial) {
         // Disable further sub-allocation should the request be too large.
         if (allocationSize > kRingBufferSize) {
             std::unique_ptr<StagingBufferBase> stagingBuffer;
@@ -95,7 +95,7 @@ namespace dawn_native {
         return uploadHandle;
     }
 
-    void DynamicUploader::Deallocate(Serial lastCompletedSerial) {
+    void DynamicUploader::Deallocate(ExecutionSerial lastCompletedSerial) {
         // Reclaim memory within the ring buffers by ticking (or removing requests no longer
         // in-flight).
         for (size_t i = 0; i < mRingBuffers.size(); ++i) {
@@ -113,7 +113,7 @@ namespace dawn_native {
     // TODO(dawn:512): Optimize this function so that it doesn't allocate additional memory
     // when it's not necessary.
     ResultOrError<UploadHandle> DynamicUploader::Allocate(uint64_t allocationSize,
-                                                          Serial serial,
+                                                          ExecutionSerial serial,
                                                           uint64_t offsetAlignment) {
         ASSERT(offsetAlignment > 0);
         UploadHandle uploadHandle;