Revert "Switch profiler from isolates to threads"

runtime/vm/profiler_test.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 "platform/assert.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/globals.h"
 #include "vm/profiler.h"
@@ skipping 828 matching lines @@
     // We should have one allocation sample.
     EXPECT_EQ(1, profile.sample_count());
     ProfileTrieWalker walker(&profile);
 
     walker.Reset(Profile::kExclusiveCode);
     EXPECT(walker.Down());
 #if defined(TARGET_OS_WINDOWS)
     // TODO(johnmccutchan): Hookup native symbol resolver on Windows.
     EXPECT_SUBSTRING("[Native]", walker.CurrentName());
 #else
-    EXPECT_SUBSTRING("dart::Profiler::SampleAllocation", walker.CurrentName());
+    EXPECT_SUBSTRING("dart::Profiler::RecordAllocation", walker.CurrentName());
 #endif
     EXPECT(!walker.Down());
   }
 
   // Disable allocation tracing for Class.
   class_class.SetTraceAllocation(false);
 
   // Invoke "bar" which during compilation, triggers a closure class allocation.
   result = Dart_Invoke(lib, NewString("bar"), 0, NULL);
   EXPECT_VALID(result);
@@ skipping 613 matching lines @@
     EXPECT(walker.Down());
     EXPECT_STREQ("go", walker.CurrentName());
     EXPECT(walker.Down());
     EXPECT_STREQ("main", walker.CurrentName());
     EXPECT(!walker.Down());
   }
 }
 
 }  // namespace dart