[compiler] Remove CompilationInfo::is_first_compile flag.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 9ba1c23e93babeb3d67fd6cb67595b0501b5dc5e..88956f434fdc6c96aa0e199e97cb88a98b0b180a 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -158,8 +158,7 @@ class CompilationInfo {
     kSplittingEnabled = 1 << 13,
     kDeoptimizationEnabled = 1 << 14,
     kSourcePositionsEnabled = 1 << 15,
-    kFirstCompile = 1 << 16,
-    kBailoutOnUninitialized = 1 << 17,
+    kBailoutOnUninitialized = 1 << 16,
   };
 
   CompilationInfo(ParseInfo* parse_info, Handle<JSFunction> closure);
@@ -292,12 +291,6 @@ class CompilationInfo {
 
   bool is_splitting_enabled() const { return GetFlag(kSplittingEnabled); }
 
-  void MarkAsFirstCompile() { SetFlag(kFirstCompile); }
-
-  void MarkAsCompiled() { SetFlag(kFirstCompile, false); }
-
-  bool is_first_compile() const { return GetFlag(kFirstCompile); }
-
   void MarkAsBailoutOnUninitialized() { SetFlag(kBailoutOnUninitialized); }
 
   bool is_bailout_on_uninitialized() const {