Replace source pointer in cc::CopyOutputRequest with a base::UnguessableToken

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

Index: content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
index 29a8e8cb9b823008fc1125a88769eef996d92e02..84dba5037d67d053768ec60cf397247a60fc18a9 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura_unittest.cc
@@ -269,7 +269,10 @@ class FakeSurfaceObserver : public cc::SurfaceObserver {
 class FakeFrameSubscriber : public RenderWidgetHostViewFrameSubscriber {
  public:
   FakeFrameSubscriber(gfx::Size size, base::Callback<void(bool)> callback)
-      : size_(size), callback_(callback), should_capture_(true) {}
+      : size_(size),
+        callback_(callback),
+        should_capture_(true),
+        source_id_for_copy_request_(base::UnguessableToken::Create()) {}
 
   bool ShouldCaptureFrame(const gfx::Rect& damage_rect,
                           base::TimeTicks present_time,
@@ -285,6 +288,10 @@ class FakeFrameSubscriber : public RenderWidgetHostViewFrameSubscriber {
     return true;
   }
 
+  const base::UnguessableToken& GetSourceIdForCopyRequest() override {
+    return source_id_for_copy_request_;
+  }
+
   base::TimeTicks last_present_time() const { return last_present_time_; }
 
   void set_should_capture(bool should_capture) {
@@ -303,6 +310,7 @@ class FakeFrameSubscriber : public RenderWidgetHostViewFrameSubscriber {
   base::Callback<void(bool)> callback_;
   base::TimeTicks last_present_time_;
   bool should_capture_;
+  base::UnguessableToken source_id_for_copy_request_;
 };
 
 class FakeWindowEventDispatcher : public aura::WindowEventDispatcher {