Add API timeline durations for snapshot creation

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "lib/stacktrace.h"
@@ skipping 1448 matching lines @@
 }
 
 
 DART_EXPORT Dart_Handle Dart_CreateSnapshot(
     uint8_t** vm_isolate_snapshot_buffer,
     intptr_t* vm_isolate_snapshot_size,
     uint8_t** isolate_snapshot_buffer,
     intptr_t* isolate_snapshot_size) {
   ASSERT(FLAG_load_deferred_eagerly);
   DARTSCOPE(Thread::Current());
+  API_TIMELINE_DURATION;
   Isolate* I = T->isolate();
   if (vm_isolate_snapshot_buffer != NULL &&
       vm_isolate_snapshot_size == NULL) {
     RETURN_NULL_ERROR(vm_isolate_snapshot_size);
   }
   if (isolate_snapshot_buffer == NULL) {
     RETURN_NULL_ERROR(isolate_snapshot_buffer);
   }
   if (isolate_snapshot_size == NULL) {
     RETURN_NULL_ERROR(isolate_snapshot_size);
@@ skipping 51 matching lines @@
 #endif  // #if defined(DEBUG).
   ScriptSnapshotWriter writer(buffer, ApiReallocate);
   writer.WriteScriptSnapshot(lib);
   *size = writer.BytesWritten();
   return Api::Success();
 }
 
 
 DART_EXPORT Dart_Handle Dart_CreateScriptSnapshot(uint8_t** buffer,
                                                   intptr_t* size) {
+  API_TIMELINE_DURATION;
   return createLibrarySnapshot(Dart_Null(), buffer, size);
 }
 
 
 DART_EXPORT Dart_Handle Dart_CreateLibrarySnapshot(Dart_Handle library,
                                                    uint8_t** buffer,
                                                    intptr_t* size) {
+  API_TIMELINE_DURATION;
   return createLibrarySnapshot(library, buffer, size);
 }
 
 
 DART_EXPORT void Dart_InterruptIsolate(Dart_Isolate isolate) {
   if (isolate == NULL) {
     FATAL1("%s expects argument 'isolate' to be non-null.",  CURRENT_FUNC);
   }
   // TODO(16615): Validate isolate parameter.
   Isolate* iso = reinterpret_cast<Isolate*>(isolate);
@@ skipping 4639 matching lines @@
   return Api::Success();
 }
 #endif  // DART_PRECOMPILER
 
 
 DART_EXPORT bool Dart_IsRunningPrecompiledCode() {
   return Dart::IsRunningPrecompiledCode();
 }
 
 }  // namespace dart