Decouple CpuFeatures from serializer state.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index ab639399adedc10dc64540fa0f85f8aaec405649..cae8a103496e3d2af7611933af3ba1173ac47069 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -419,65 +419,6 @@ class MemOperand : public Operand {
 };
 
 
-// CpuFeatures keeps track of which features are supported by the target CPU.
-// Supported features must be enabled by a CpuFeatureScope before use.
-class CpuFeatures : public AllStatic {
- public:
-  // Detect features of the target CPU. Set safe defaults if the serializer
-  // is enabled (snapshots must be portable).
-  static void Probe(bool serializer_enabled);
-
-  // A special case for printing target and features, which we want to do
-  // before initializing the isolate
-
-  // Check whether a feature is supported by the target CPU.
-  static bool IsSupported(CpuFeature f) {
-    ASSERT(initialized_);
-    return Check(f, supported_);
-  }
-
-  static bool IsSafeForSnapshot(Isolate* isolate, CpuFeature f) {
-    return Check(f, cross_compile_) ||
-           (IsSupported(f) &&
-            !(Serializer::enabled(isolate) &&
-              Check(f, found_by_runtime_probing_only_)));
-  }
-
-  static bool VerifyCrossCompiling() {
-    return cross_compile_ == 0;
-  }
-
-  static bool VerifyCrossCompiling(CpuFeature f) {
-    unsigned mask = flag2set(f);
-    return cross_compile_ == 0 ||
-           (cross_compile_ & mask) == mask;
-  }
-
-  static bool SupportsCrankshaft() { return CpuFeatures::IsSupported(FPU); }
-
- private:
-  static bool Check(CpuFeature f, unsigned set) {
-    return (set & flag2set(f)) != 0;
-  }
-
-  static unsigned flag2set(CpuFeature f) {
-    return 1u << f;
-  }
-
-#ifdef DEBUG
-  static bool initialized_;
-#endif
-  static unsigned supported_;
-  static unsigned found_by_runtime_probing_only_;
-
-  static unsigned cross_compile_;
-
-  friend class ExternalReference;
-  friend class PlatformFeatureScope;
-  DISALLOW_COPY_AND_ASSIGN(CpuFeatures);
-};
-
-
 class Assembler : public AssemblerBase {
  public:
   // Create an assembler. Instructions and relocation information are emitted