bind-gen: Rename V8T::ToBlinkUnsafe to ToWrappableUnsafe

Gives a better name than "Impl" and "Blink(Value)".  V8 object
and Blink object are called "wrapper" and "wrappable"
respectively.  C.f. ScriptWrappable.

Bug: 839389
Change-Id: I9bec47bf5db5f7c46d73dfea92c11fcaf5d65c62
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2098136Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#749561}

third_party/blink/renderer/bindings/scripts/bind_gen/interface.py

@@ -299,13 +299,13 @@ def bind_callback_local_vars(code_node, cg_context):
         if (not cg_context.member_like or
                 "CrossOrigin" in cg_context.member_like.extended_attributes):
             text = ("DOMWindow* ${blink_receiver} = "
-                    "${class_name}::ToBlinkUnsafe(${v8_receiver});")
+                    "${class_name}::ToWrappableUnsafe(${v8_receiver});")
         else:
             text = ("LocalDOMWindow* ${blink_receiver} = To<LocalDOMWindow>("
-                    "${class_name}::ToBlinkUnsafe(${v8_receiver}));")
+                    "${class_name}::ToWrappableUnsafe(${v8_receiver}));")
     else:
         pattern = ("{_1}* ${blink_receiver} = "
-                   "${class_name}::ToBlinkUnsafe(${v8_receiver});")
+                   "${class_name}::ToWrappableUnsafe(${v8_receiver});")
         _1 = blink_class_name(cg_context.class_like)
         text = _format(pattern, _1=_1)
     local_vars.append(S("blink_receiver", text))

third_party/blink/renderer/platform/bindings/v8_interface_bridge.h

@@ -51,7 +51,13 @@ class PLATFORM_EXPORT V8InterfaceBridgeBase {
 template <class V8T, class T>
 class V8InterfaceBridge : public V8InterfaceBridgeBase {
  public:
-  static T* ToBlinkUnsafe(v8::Local<v8::Object> value) {
+  static T* ToWrappable(v8::Isolate* isolate, v8::Local<v8::Value> value) {
+    return HasInstance(isolate, value)
+               ? ToWrappableUnsafe(value.As<v8::Object>())
+               : nullptr;
+  }
+
+  static T* ToWrappableUnsafe(v8::Local<v8::Object> value) {
     return ToScriptWrappable(value)->ToImpl<T>();
   }
 
@@ -65,12 +71,13 @@ class V8InterfaceBridge : public V8InterfaceBridgeBase {
     return HasInstance(isolate, value);
   }
 
-  static T* ToImpl(v8::Local<v8::Object> value) { return ToBlinkUnsafe(value); }
+  static T* ToImpl(v8::Local<v8::Object> value) {
+    return ToWrappableUnsafe(value);
+  }
 
   static T* ToImplWithTypeCheck(v8::Isolate* isolate,
                                 v8::Local<v8::Value> value) {
-    return HasInstance(isolate, value) ? ToBlinkUnsafe(value.As<v8::Object>())
-                                       : nullptr;
+    return ToWrappable(isolate, value);
   }
 
   static void InstallContextDependentAdapter(