Keep two empty lines between declarations for cpp files

test/cctest/test-heap-profiler.cc

Index: test/cctest/test-heap-profiler.cc
===================================================================
--- test/cctest/test-heap-profiler.cc	(revision 15486)
+++ test/cctest/test-heap-profiler.cc	(working copy)
@@ -340,6 +340,7 @@
   CHECK_EQ(v8::HeapGraphNode::kHeapNumber, b->GetType());
 }
 
+
 TEST(HeapSnapshotSlicedString) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ -364,6 +365,7 @@
   CHECK_EQ(parent_string, parent);
 }
 
+
 TEST(HeapSnapshotInternalReferences) {
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
   v8::HandleScope scope(isolate);
@@ -481,6 +483,7 @@
   CHECK_EQ_SNAPSHOT_OBJECT_ID(k1->GetId(), k2->GetId());
 }
 
+
 TEST(HeapEntryIdsAndGC) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ -1017,6 +1020,7 @@
 };
 }
 
+
 TEST(TakeHeapSnapshotAborting) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ -1340,6 +1344,7 @@
   }
 };
 
+
 TEST(GlobalObjectName) {
   LocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ -1606,6 +1611,7 @@
   CHECK_NE(NULL, hidden_props);
 }
 
+
 bool HasWeakEdge(const v8::HeapGraphNode* node) {
   for (int i = 0; i < node->GetChildrenCount(); ++i) {
     const v8::HeapGraphEdge* handle_edge = node->GetChild(i);