Keep two empty lines between declarations for cpp files

test/cctest/test-assembler-x64.cc

Index: test/cctest/test-assembler-x64.cc
===================================================================
--- test/cctest/test-assembler-x64.cc	(revision 15486)
+++ test/cctest/test-assembler-x64.cc	(working copy)
@@ -110,6 +110,7 @@
   CHECK_EQ(2, result);
 }
 
+
 TEST(AssemblerX64StackOperations) {
   OS::SetUp();
   // Allocate an executable page of memory.
@@ -142,6 +143,7 @@
   CHECK_EQ(2, result);
 }
 
+
 TEST(AssemblerX64ArithmeticOperations) {
   OS::SetUp();
   // Allocate an executable page of memory.
@@ -164,6 +166,7 @@
   CHECK_EQ(5, result);
 }
 
+
 TEST(AssemblerX64ImulOperation) {
   OS::SetUp();
   // Allocate an executable page of memory.
@@ -192,6 +195,7 @@
   CHECK_EQ(-1, result);
 }
 
+
 TEST(AssemblerX64MemoryOperands) {
   OS::SetUp();
   // Allocate an executable page of memory.
@@ -226,6 +230,7 @@
   CHECK_EQ(3, result);
 }
 
+
 TEST(AssemblerX64ControlFlow) {
   OS::SetUp();
   // Allocate an executable page of memory.
@@ -255,6 +260,7 @@
   CHECK_EQ(3, result);
 }
 
+
 TEST(AssemblerX64LoopImmediates) {
   OS::SetUp();
   // Allocate an executable page of memory.