Plumbing blink::Interface{Provider|Registry} through WebLocalFrame's constructor.

third_party/WebKit/Source/web/tests/ScreenWakeLockTest.cpp

 // Copyright 2015 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.
 
 #include "modules/wake_lock/ScreenWakeLock.h"
 
 #include "core/dom/DOMImplementation.h"
 #include "core/dom/Document.h"
 #include "core/dom/DocumentInit.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
@@ skipping 49 matching lines @@
 
   bool m_wakeLockStatus;
 };
 
 void MockInterfaceProvider::getInterface(const char* name,
                                          mojo::ScopedMessagePipeHandle handle) {
   m_mockWakeLockService.reset(new MockWakeLockService(
       this, mojo::MakeRequest<WakeLockService>(std::move(handle))));
 }
 
-// A TestWebFrameClient to allow overriding the interfaceProvider() with a mock.
+// A TestWebFrameClient that overrides the blink::InterfaceProvider with a mock.
 class TestWebFrameClient : public blink::FrameTestHelpers::TestWebFrameClient {
  public:
   ~TestWebFrameClient() override = default;
+
   blink::InterfaceProvider* interfaceProvider() override {
     return &m_interfaceProvider;
   }
 
  private:
   MockInterfaceProvider m_interfaceProvider;
 };
 
 class ScreenWakeLockTest : public testing::Test {
  protected:
@@ skipping 121 matching lines @@
   ASSERT_FALSE(clientKeepScreenAwake());
 
   setKeepAwake(true);
   loadFrame();
 
   EXPECT_FALSE(screenKeepAwake());
   EXPECT_FALSE(clientKeepScreenAwake());
 }
 
 }  // namespace