Use kRenderClientId command line flag when starting a render process

content/renderer/mus/compositor_mus_connection_unittest.cc

 // Copyright 2016 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 "content/renderer/mus/compositor_mus_connection.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 15 matching lines @@
 #include "ui/events/blink/did_overscroll_params.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/mojo/event.mojom.h"
 #include "ui/events/mojo/event_constants.mojom.h"
 #include "ui/events/mojo/keyboard_codes.mojom.h"
 
 using ui::mojom::EventResult;
 
 namespace {
 
+constexpr cc::FrameSinkId kArbitraryFrameSinkId(0, 1);
+
 // Wrapper for the callback provided to
 // CompositorMusConnection:OnWindowInputEvent. This tracks whether the it was
 // called, along with the result.
 class TestCallback : public base::RefCounted<TestCallback> {
  public:
   TestCallback() : called_(false), result_(EventResult::UNHANDLED) {}
 
   bool called() { return called_; }
   EventResult result() { return result_; }
 
@@ skipping 102 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(TestInputHandlerManagerClient);
 };
 
 // Implementation of RenderWidget for testing, performs no initialization.
 class TestRenderWidget : public content::RenderWidget {
  public:
   explicit TestRenderWidget(content::CompositorDependencies* compositor_deps)
       : content::RenderWidget(compositor_deps,
                               blink::WebPopupTypeNone,
                               content::ScreenInfo(),
+                              kArbitraryFrameSinkId,
                               true,
                               false,
                               false) {}
 
  protected:
   ~TestRenderWidget() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestRenderWidget);
 };
@@ skipping 327 matching lines @@
   EXPECT_FALSE(ack_callback.get());
 
   VerifyAndRunQueues(true, true);
 
   // The ack callback should have been called
   EXPECT_TRUE(test_callback->called());
   EXPECT_EQ(EventResult::HANDLED, test_callback->result());
 }
 
 }  // namespace content