Remove trailing semicolon at the end of a method definition

ios/web/navigation/navigation_manager_impl_unittest.mm

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/navigation/navigation_manager_impl.h"
 
 #include "base/logging.h"
 #include "base/mac/bind_objc_block.h"
 #import "base/mac/scoped_nsobject.h"
 #import "ios/web/navigation/crw_session_controller+private_constructors.h"
@@ skipping 27 matching lines @@
 class TestNavigationManagerDelegate : public NavigationManagerDelegate {
  public:
   bool reload_called() { return reload_called_; }
 
  private:
   // NavigationManagerDelegate overrides.
   void GoToIndex(int index) override {}
   void LoadURLWithParams(const NavigationManager::WebLoadParams&) override {}
   void Reload() override { reload_called_ = true; }
   void OnNavigationItemsPruned(size_t pruned_item_count) override {}
-  void OnNavigationItemChanged() override{};
+  void OnNavigationItemChanged() override {}
   void OnNavigationItemCommitted(const LoadCommittedDetails&) override {}
   WebState* GetWebState() override { return nullptr; }
 
   bool reload_called_ = false;
 };
 }  // namespace
 
 // Test fixture for NavigationManagerImpl testing.
 class NavigationManagerTest : public PlatformTest {
  protected:
@@ skipping 1322 matching lines @@
   // Create an item that does not exist in the NavigationManagerImpl.
   std::unique_ptr<web::NavigationItem> item_not_found =
       web::NavigationItem::Create();
   // Verify GetIndexOfItem() results.
   EXPECT_EQ(0, navigation_manager()->GetIndexOfItem(item0));
   EXPECT_EQ(1, navigation_manager()->GetIndexOfItem(item1));
   EXPECT_EQ(-1, navigation_manager()->GetIndexOfItem(item_not_found.get()));
 }
 
 }  // namespace web