Keep two empty lines between declarations for cpp files

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
===================================================================
--- src/arm/assembler-arm.cc	(revision 15486)
+++ src/arm/assembler-arm.cc	(working copy)
@@ -56,6 +56,7 @@
   return ExternalReference(&CpuFeatures::supported_);
 }
 
+
 // Get the CPU features enabled by the build. For cross compilation the
 // preprocessor symbols CAN_USE_ARMV7_INSTRUCTIONS and CAN_USE_VFP3_INSTRUCTIONS
 // can be defined to enable ARMv7 and VFPv3 instructions when building the
@@ -356,6 +357,7 @@
   am_ = am;
 }
 
+
 MemOperand::MemOperand(Register rn, Register rm, AddrMode am) {
   rn_ = rn;
   rm_ = rm;
@@ -677,6 +679,7 @@
   return instr & kOff12Mask;
 }
 
+
 // Labels refer to positions in the (to be) generated code.
 // There are bound, linked, and unused labels.
 //
@@ -1640,6 +1643,7 @@
   addrmod3(cond | B7 | B6 | B5 | B4, src1, dst);
 }
 
+
 // Load/Store multiple instructions.
 void Assembler::ldm(BlockAddrMode am,
                     Register base,
@@ -2074,6 +2078,7 @@
        0xA*B8 | count);
 }
 
+
 static void DoubleAsTwoUInt32(double d, uint32_t* lo, uint32_t* hi) {
   uint64_t i;
   OS::MemCopy(&i, &d, 8);
@@ -2082,6 +2087,7 @@
   *hi = i >> 32;
 }
 
+
 // Only works for little endian floating point formats.
 // We don't support VFP on the mixed endian floating point platform.
 static bool FitsVMOVDoubleImmediate(double d, uint32_t *encoding) {
@@ -2774,6 +2780,7 @@
 #endif
 }
 
+
 void Assembler::GrowBuffer() {
   if (!own_buffer_) FATAL("external code buffer is too small");
 
@@ -2894,6 +2901,7 @@
   }
 }
 
+
 void Assembler::RecordRelocInfo(double data) {
   // We do not try to reuse pool constants.
   RelocInfo rinfo(pc_, data);