Enable stub generation using Hydrogen/Lithium (again)

src/x64/code-stubs-x64.h

Index: src/x64/code-stubs-x64.h
diff --git a/src/x64/code-stubs-x64.h b/src/x64/code-stubs-x64.h
index 6a1a18f830a6c78f6b024b1e65b897a121835e7e..8dd20d7bb0d17f2bcfcc41e26b48aba6cd885ab3 100644
--- a/src/x64/code-stubs-x64.h
+++ b/src/x64/code-stubs-x64.h
@@ -37,7 +37,7 @@ namespace internal {
 
 // Compute a transcendental math function natively, or call the
 // TranscendentalCache runtime function.
-class TranscendentalCacheStub: public CodeStub {
+class TranscendentalCacheStub: public PlatformCodeStub {
  public:
   enum ArgumentType {
     TAGGED = 0,
@@ -60,7 +60,7 @@ class TranscendentalCacheStub: public CodeStub {
 };
 
 
-class StoreBufferOverflowStub: public CodeStub {
+class StoreBufferOverflowStub: public PlatformCodeStub {
  public:
   explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp)
       : save_doubles_(save_fp) { }
@@ -86,7 +86,7 @@ enum GenericBinaryFlags {
 };
 
 
-class UnaryOpStub: public CodeStub {
+class UnaryOpStub: public PlatformCodeStub {
  public:
   UnaryOpStub(Token::Value op,
               UnaryOverwriteMode mode,
@@ -157,7 +157,7 @@ class UnaryOpStub: public CodeStub {
 };
 
 
-class BinaryOpStub: public CodeStub {
+class BinaryOpStub: public PlatformCodeStub {
  public:
   BinaryOpStub(Token::Value op, OverwriteMode mode)
       : op_(op),
@@ -312,7 +312,7 @@ enum StringAddFlags {
 };
 
 
-class StringAddStub: public CodeStub {
+class StringAddStub: public PlatformCodeStub {
  public:
   explicit StringAddStub(StringAddFlags flags) : flags_(flags) {}
 
@@ -334,7 +334,7 @@ class StringAddStub: public CodeStub {
 };
 
 
-class SubStringStub: public CodeStub {
+class SubStringStub: public PlatformCodeStub {
  public:
   SubStringStub() {}
 
@@ -346,7 +346,7 @@ class SubStringStub: public CodeStub {
 };
 
 
-class StringCompareStub: public CodeStub {
+class StringCompareStub: public PlatformCodeStub {
  public:
   StringCompareStub() {}
 
@@ -383,7 +383,7 @@ class StringCompareStub: public CodeStub {
 };
 
 
-class NumberToStringStub: public CodeStub {
+class NumberToStringStub: public PlatformCodeStub {
  public:
   NumberToStringStub() { }
 
@@ -412,7 +412,7 @@ class NumberToStringStub: public CodeStub {
 };
 
 
-class StringDictionaryLookupStub: public CodeStub {
+class StringDictionaryLookupStub: public PlatformCodeStub {
  public:
   enum LookupMode { POSITIVE_LOOKUP, NEGATIVE_LOOKUP };
 
@@ -474,7 +474,7 @@ class StringDictionaryLookupStub: public CodeStub {
 };
 
 
-class RecordWriteStub: public CodeStub {
+class RecordWriteStub: public PlatformCodeStub {
  public:
   RecordWriteStub(Register object,
                   Register value,
@@ -657,7 +657,7 @@ class RecordWriteStub: public CodeStub {
     Register GetRegThatIsNotRcxOr(Register r1,
                                   Register r2,
                                   Register r3) {
-      for (int i = 0; i < Register::kNumAllocatableRegisters; i++) {
+      for (int i = 0; i < Register::NumAllocatableRegisters(); i++) {
         Register candidate = Register::FromAllocationIndex(i);
         if (candidate.is(rcx)) continue;
         if (candidate.is(r1)) continue;