diff --git a/common.gypi b/common.gypi
index 0a5a8ecc19fd2f..bf9556e77bd364 100644
--- a/common.gypi
+++ b/common.gypi
@@ -37,7 +37,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.6',
+    'v8_embedder_string': '-node.7',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index f76fd34183a342..ac96091ef6b284 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -6497,10 +6497,6 @@ class V8_EXPORT Extension {  // NOLINT
   bool auto_enable_;
 };
 
-V8_DEPRECATED(
-    "Use unique_ptr version or stop using extension (http://crbug.com/334679).",
-    void V8_EXPORT RegisterExtension(Extension* extension));
-
 void V8_EXPORT RegisterExtension(std::unique_ptr<Extension>);
 
 // --- Statics ---
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index 657c93419c7c6c..6742907a700d25 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -898,19 +898,9 @@ void V8::SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags) {
 
 RegisteredExtension* RegisteredExtension::first_extension_ = nullptr;
 
-RegisteredExtension::RegisteredExtension(Extension* extension)
-    : legacy_unowned_extension_(extension) {}
-
 RegisteredExtension::RegisteredExtension(std::unique_ptr<Extension> extension)
     : extension_(std::move(extension)) {}
 
-// static
-void RegisteredExtension::Register(Extension* extension) {
-  RegisteredExtension* new_extension = new RegisteredExtension(extension);
-  new_extension->next_ = first_extension_;
-  first_extension_ = new_extension;
-}
-
 // static
 void RegisteredExtension::Register(std::unique_ptr<Extension> extension) {
   RegisteredExtension* new_extension =
@@ -946,8 +936,6 @@ class ExtensionResource : public String::ExternalOneByteStringResource {
 };
 }  // anonymous namespace
 
-void RegisterExtension(Extension* that) { RegisteredExtension::Register(that); }
-
 void RegisterExtension(std::unique_ptr<Extension> extension) {
   RegisteredExtension::Register(std::move(extension));
 }
diff --git a/deps/v8/src/api.h b/deps/v8/src/api.h
index 40f4e18025395e..5491a9ece5cc01 100644
--- a/deps/v8/src/api.h
+++ b/deps/v8/src/api.h
@@ -71,20 +71,14 @@ class ApiFunction {
 
 class RegisteredExtension {
  public:
-  static void Register(Extension*);
   static void Register(std::unique_ptr<Extension>);
   static void UnregisterAll();
-  Extension* extension() const {
-    return legacy_unowned_extension_ ? legacy_unowned_extension_
-                                     : extension_.get();
-  }
+  Extension* extension() const { return extension_.get(); }
   RegisteredExtension* next() const { return next_; }
   static RegisteredExtension* first_extension() { return first_extension_; }
  private:
   explicit RegisteredExtension(Extension*);
   explicit RegisteredExtension(std::unique_ptr<Extension>);
-  // TODO(clemensh): Remove this after the 7.4 branch.
-  Extension* legacy_unowned_extension_ = nullptr;
   std::unique_ptr<Extension> extension_;
   RegisteredExtension* next_ = nullptr;
   static RegisteredExtension* first_extension_;