[builtins] Migrate escape/unescape from uri.js to C++.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 19e4221706bfc917ccc1e1e772f201b69386fdba..8d8465d61ffd84a0a18a129059a42d8f4e14ca58 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2854,6 +2854,14 @@ bool Genesis::InstallNatives(GlobalContextType context_type) {
   SimpleInstallFunction(global_object, "encodeURIComponent",
                         Builtins::kGlobalEncodeURIComponent, 1, false);
 
+  // Install Global.escape.
+  SimpleInstallFunction(global_object, "escape", Builtins::kGlobalEscape, 1,
+                        false);
+
+  // Install Global.unescape.
+  SimpleInstallFunction(global_object, "unescape", Builtins::kGlobalUnescape, 1,
+                        false);
+
   // Install Global.eval.
   {
     Handle<JSFunction> eval =