Added new GetHeapStatistics API entry and deprecated old one.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 8cb85a7c0478324a163f4d955d3f2d4961c82e03..64a003e049506ef8f54245fe83f72510ff04be89 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -15205,7 +15205,7 @@ THREADED_TEST(GetHeapStatistics) {
   v8::HeapStatistics heap_statistics;
   CHECK_EQ(static_cast<int>(heap_statistics.total_heap_size()), 0);
   CHECK_EQ(static_cast<int>(heap_statistics.used_heap_size()), 0);
-  v8::V8::GetHeapStatistics(&heap_statistics);
+  c1->GetIsolate()->GetHeapStatistics(&heap_statistics);
   CHECK_NE(static_cast<int>(heap_statistics.total_heap_size()), 0);
   CHECK_NE(static_cast<int>(heap_statistics.used_heap_size()), 0);
 }