Revert "Soft fail for invalid cache data."

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index 2feb8fd84646d817b9f6cd0bf0fed092fce05211..1650cba52123278ef9a61affa38e4890ce57ea89 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -62,14 +62,10 @@ class FunctionEntry BASE_EMBEDDED {
 // Wrapper around ScriptData to provide parser-specific functionality.
 class ParseData {
  public:
-  static ParseData* FromCachedData(ScriptData* cached_data) {
-    ParseData* pd = new ParseData(cached_data);
-    if (pd->IsSane()) return pd;
-    cached_data->Reject();
-    delete pd;
-    return NULL;
+  explicit ParseData(ScriptData* script_data) : script_data_(script_data) {
+    CHECK(IsAligned(script_data->length(), sizeof(unsigned)));
+    CHECK(IsSane());
   }
-
   void Initialize();
   FunctionEntry GetFunctionEntry(int start);
   int FunctionCount();
@@ -81,8 +77,6 @@ class ParseData {
   }
 
  private:
-  explicit ParseData(ScriptData* script_data) : script_data_(script_data) {}
-
   bool IsSane();
   unsigned Magic();
   unsigned Version();
@@ -694,13 +688,6 @@ class Parser : public ParserBase<ParserTraits> {
   ScriptCompiler::CompileOptions compile_options() const {
     return info_->compile_options();
   }
-  bool consume_cached_parse_data() const {
-    return compile_options() == ScriptCompiler::kConsumeParserCache &&
-           cached_parse_data_ != NULL;
-  }
-  bool produce_cached_parse_data() const {
-    return compile_options() == ScriptCompiler::kProduceParserCache;
-  }
   Scope* DeclarationScope(VariableMode mode) {
     return IsLexicalVariableMode(mode)
         ? scope_ : scope_->DeclarationScope();