Revert of Reland "Keep a canonical list of shared function infos."

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 0019b6d578c803af9f19376d253cfc8945165ef6..48043e62f815a351c1e189ca0b1e46d449a40703 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5291,8 +5291,11 @@
   DCHECK(!HasStackOverflow());
   DCHECK(current_block() != NULL);
   DCHECK(current_block()->HasPredecessor());
-  Handle<SharedFunctionInfo> shared_info = Compiler::GetSharedFunctionInfo(
-      expr, current_info()->script(), top_info());
+  Handle<SharedFunctionInfo> shared_info = expr->shared_info();
+  if (shared_info.is_null()) {
+    shared_info =
+        Compiler::BuildFunctionInfo(expr, current_info()->script(), top_info());
+  }
   // We also have a stack overflow if the recursive compilation did.
   if (HasStackOverflow()) return;
   HFunctionLiteral* instr =
@@ -11666,7 +11669,7 @@
   switch (variable->location()) {
     case Variable::UNALLOCATED: {
       globals_.Add(variable->name(), zone());
-      Handle<SharedFunctionInfo> function = Compiler::GetSharedFunctionInfo(
+      Handle<SharedFunctionInfo> function = Compiler::BuildFunctionInfo(
           declaration->fun(), current_info()->script(), top_info());
       // Check for stack-overflow exception.
       if (function.is_null()) return SetStackOverflow();