VM: Re-format to use at most one newline between functions

runtime/vm/instructions_x64.h

 // Copyright (c) 2012, 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.
 // Classes that describe assembly patterns as used by inline caches.
 
 #ifndef RUNTIME_VM_INSTRUCTIONS_X64_H_
 #define RUNTIME_VM_INSTRUCTIONS_X64_H_
 
 #ifndef RUNTIME_VM_INSTRUCTIONS_H_
 #error Do not include instructions_ia32.h directly; use instructions.h instead.
 #endif
 
 #include "vm/allocation.h"
 #include "vm/object.h"
 
 namespace dart {
 
 // Forward declarations.
 class RawClass;
 class Immediate;
 class RawObject;
 
-
 intptr_t IndexFromPPLoad(uword start);
 intptr_t IndexFromPPLoadDisp8(uword start);
 
-
 // Template class for all instruction pattern classes.
 // P has to specify a static pattern and a pattern length method.
 template <class P>
 class InstructionPattern : public ValueObject {
  public:
   explicit InstructionPattern(uword pc) : start_(pc) { ASSERT(pc != 0); }
 
   // Call to check if the instruction pattern at 'pc' match the instruction.
   // 'P::pattern()' returns the expected byte pattern in form of an integer
   // array with length of 'P::pattern_length_in_bytes()'. A '-1' element means
@@ skipping 19 matching lines @@
       }
     }
     return true;
   }
 
   const uword start_;
 
   DISALLOW_COPY_AND_ASSIGN(InstructionPattern);
 };
 
-
 class ReturnPattern : public InstructionPattern<ReturnPattern> {
  public:
   explicit ReturnPattern(uword pc) : InstructionPattern(pc) {}
 
   static const int* pattern() {
     static const int kReturnPattern[kLengthInBytes] = {0xC3};
     return kReturnPattern;
   }
 
   static int pattern_length_in_bytes() { return kLengthInBytes; }
 
  private:
   static const int kLengthInBytes = 1;
 };
 
-
 // push rbp
 // mov rbp, rsp
 class ProloguePattern : public InstructionPattern<ProloguePattern> {
  public:
   explicit ProloguePattern(uword pc) : InstructionPattern(pc) {}
 
   static const int* pattern() {
     static const int kProloguePattern[kLengthInBytes] = {0x55, 0x48, 0x89,
                                                          0xe5};
     return kProloguePattern;
   }
 
   static int pattern_length_in_bytes() { return kLengthInBytes; }
 
  private:
   static const int kLengthInBytes = 4;
 };
 
-
 // mov rbp, rsp
 class SetFramePointerPattern
     : public InstructionPattern<SetFramePointerPattern> {
  public:
   explicit SetFramePointerPattern(uword pc) : InstructionPattern(pc) {}
 
   static const int* pattern() {
     static const int kFramePointerPattern[kLengthInBytes] = {0x48, 0x89, 0xe5};
     return kFramePointerPattern;
   }
 
   static int pattern_length_in_bytes() { return kLengthInBytes; }
 
  private:
   static const int kLengthInBytes = 3;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_INSTRUCTIONS_X64_H_