Revert "Support for precise stepping in functions compiled before debugging was started (step 2)"

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index bea5206ba44fe22ef3548006a82c61ef834fbd47..ba6bb42bfa2862ad21932d47d1e82ea7b3b60f00 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -58,6 +58,7 @@ CompilationInfo::CompilationInfo(Handle<Script> script)
       script_(script),
       extension_(NULL),
       pre_parse_data_(NULL),
+      supports_deoptimization_(false),
       osr_ast_id_(AstNode::kNoNumber) {
   Initialize(NONOPT);
 }
@@ -72,6 +73,7 @@ CompilationInfo::CompilationInfo(Handle<SharedFunctionInfo> shared_info)
       script_(Handle<Script>(Script::cast(shared_info->script()))),
       extension_(NULL),
       pre_parse_data_(NULL),
+      supports_deoptimization_(false),
       osr_ast_id_(AstNode::kNoNumber) {
   Initialize(BASE);
 }
@@ -87,6 +89,7 @@ CompilationInfo::CompilationInfo(Handle<JSFunction> closure)
       script_(Handle<Script>(Script::cast(shared_info_->script()))),
       extension_(NULL),
       pre_parse_data_(NULL),
+      supports_deoptimization_(false),
       osr_ast_id_(AstNode::kNoNumber) {
   Initialize(BASE);
 }
@@ -305,9 +308,9 @@ static bool MakeCrankshaftCode(CompilationInfo* info) {
 
 
 static bool GenerateCode(CompilationInfo* info) {
-  return info->IsCompilingForDebugging() || !V8::UseCrankshaft() ?
-      FullCodeGenerator::MakeCode(info) :
-      MakeCrankshaftCode(info);
+  return V8::UseCrankshaft() ?
+    MakeCrankshaftCode(info) :
+    FullCodeGenerator::MakeCode(info);
 }