[wasm] Reduce calls to {TriggerCallbacks}

Each run of {OnFinishedUnits} can only trigger baseline completion or
top tier completion at most once, so we can pull the call out of the
loop.

R=ahaas@chromium.org

Change-Id: I7eaf42addbbaa9600cb9bf95dce76399be683971
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1889879Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64653}

src/wasm/module-compiler.cc

@@ -2372,13 +2372,13 @@ void CompilationStateImpl::OnFinishedUnits(Vector<WasmCode*> code_vector) {
   DCHECK_EQ(compilation_progress_.size(),
             native_module_->module()->num_declared_functions);
 
+  bool completes_baseline_compilation = false;
+  bool completes_top_tier_compilation = false;
+
   for (WasmCode* code : code_vector) {
     DCHECK_NOT_NULL(code);
     DCHECK_LT(code->index(), native_module_->num_functions());
 
-    bool completes_baseline_compilation = false;
-    bool completes_top_tier_compilation = false;
-
     if (code->index() < native_module_->num_imported_functions()) {
       // Import wrapper.
       DCHECK_EQ(code->tier(), ExecutionTier::kTurbofan);
@@ -2429,10 +2429,10 @@ void CompilationStateImpl::OnFinishedUnits(Vector<WasmCode*> code_vector) {
       }
       DCHECK_LE(0, outstanding_baseline_units_);
     }
-
-    TriggerCallbacks(completes_baseline_compilation,
-                     completes_top_tier_compilation);
   }
+
+  TriggerCallbacks(completes_baseline_compilation,
+                   completes_top_tier_compilation);
 }
 
 void CompilationStateImpl::OnFinishedJSToWasmWrapperUnits(int num) {