[builtins] Introduce proper Float64Log2 and Float64Log10 operators.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 33ab85be4f3bce8b17bf4565465fff4dc0c735f0..7caf16dff9499d80c5dcde6b7cba3fb0bd454a7e 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1804,6 +1804,10 @@ Type* Typer::Visitor::TypeNumberLog(Node* node) { return Type::Number(); }
 
 Type* Typer::Visitor::TypeNumberLog1p(Node* node) { return Type::Number(); }
 
+Type* Typer::Visitor::TypeNumberLog2(Node* node) { return Type::Number(); }
+
+Type* Typer::Visitor::TypeNumberLog10(Node* node) { return Type::Number(); }
+
 Type* Typer::Visitor::TypeNumberRound(Node* node) {
   return TypeUnaryOp(node, NumberRound);
 }
@@ -2559,6 +2563,10 @@ Type* Typer::Visitor::TypeFloat64Log(Node* node) { return Type::Number(); }
 
 Type* Typer::Visitor::TypeFloat64Log1p(Node* node) { return Type::Number(); }
 
+Type* Typer::Visitor::TypeFloat64Log2(Node* node) { return Type::Number(); }
+
+Type* Typer::Visitor::TypeFloat64Log10(Node* node) { return Type::Number(); }
+
 Type* Typer::Visitor::TypeFloat64Sqrt(Node* node) { return Type::Number(); }