Begin using a list of bailouts instead of a singleton in the fast code generator.

src/fast-codegen.h

Index: src/fast-codegen.h
diff --git a/src/fast-codegen.h b/src/fast-codegen.h
index f39da21ad7da6e2f9a292e033d4dab841b4198ab..c36f99acc4f81c73e8073c0f6af1b7a42052c907 100644
--- a/src/fast-codegen.h
+++ b/src/fast-codegen.h
@@ -80,7 +80,6 @@ class FastCodeGenerator: public AstVisitor {
  private:
   MacroAssembler* masm() { return masm_; }
   CompilationInfo* info() { return info_; }
-  Label* bailout() { return &bailout_; }
 
   Register destination() { return destination_; }
   void set_destination(Register reg) { destination_ = reg; }
@@ -146,7 +145,6 @@ class FastCodeGenerator: public AstVisitor {
 
   MacroAssembler* masm_;
   CompilationInfo* info_;
-  Label bailout_;
   Register destination_;
   uint32_t smi_bits_;