Add timeline events for CompileClass and CompileTopLevel.

runtime/vm/compiler.cc

 // Copyright (c) 2012, 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 "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 291 matching lines @@
     }
   }
 
   Thread* const thread = Thread::Current();
   Isolate* const isolate = thread->isolate();
   StackZone zone(thread);
   // We remember all the classes that are being compiled in these lists. This
   // also allows us to reset the marked_for_parsing state in case we see an
   // error.
   VMTagScope tagScope(thread, VMTag::kCompileClassTagId);
+  TimelineDurationScope tds(thread,
+                            thread->isolate()->GetCompilerStream(),
+                            "CompileClass");
+  if (tds.enabled()) {
+    tds.SetNumArguments(1);
+    tds.CopyArgument(
+        0,
+        "class",
+        const_cast<char*>(cls.ToCString()));
+  }
+
   GrowableHandlePtrArray<const Class> parse_list(thread->zone(), 4);
   GrowableHandlePtrArray<const Class> patch_list(thread->zone(), 4);
 
   // Parse the class and all the interfaces it implements and super classes.
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     if (FLAG_trace_compiler) {
       THR_Print("Compiling Class '%s'\n", cls.ToCString());
     }
 
@@ skipping 1555 matching lines @@
 }
 
 
 void BackgroundCompiler::EnsureInit(Thread* thread) {
   UNREACHABLE();
 }
 
 #endif  // DART_PRECOMPILED
 
 }  // namespace dart