[builtins] Add String.prototype.indexOf fast path in TF

src/interface-descriptors.h

Index: src/interface-descriptors.h
diff --git a/src/interface-descriptors.h b/src/interface-descriptors.h
index 1d1b48af93a0b4ab780f021beb69481897af625c..34951d240ce440f6ffa61def0f035274d385f909 100644
--- a/src/interface-descriptors.h
+++ b/src/interface-descriptors.h
@@ -77,6 +77,7 @@ class PlatformInterfaceDescriptor;
   V(StringCharAt)                         \
   V(StringCharCodeAt)                     \
   V(StringCompare)                        \
+  V(StringIndexOf)                        \
   V(SubString)                            \
   V(Keyed)                                \
   V(Named)                                \
@@ -745,6 +746,13 @@ class SubStringDescriptor : public CallInterfaceDescriptor {
                                      CallInterfaceDescriptor)
 };
 
+class StringIndexOfDescriptor final : public CallInterfaceDescriptor {
+ public:
+  DEFINE_PARAMETERS(kReceiver, kSearchString, kPosition)
+  DECLARE_DEFAULT_DESCRIPTOR(StringIndexOfDescriptor, CallInterfaceDescriptor,
+                             kParameterCount)
+};
+
 // TODO(ishell): not used, remove.
 class KeyedDescriptor : public CallInterfaceDescriptor {
  public: