Replace cc::ViewportSelectionBound with gfx::SelectionBound

cc/output/compositor_frame_metadata.h

Index: cc/output/compositor_frame_metadata.h
diff --git a/cc/output/compositor_frame_metadata.h b/cc/output/compositor_frame_metadata.h
index 54b2047fcd64542aa2aee283aeac45672f0938d7..2ac6a334d83720cc1cfb5633109136cddedd92bd 100644
--- a/cc/output/compositor_frame_metadata.h
+++ b/cc/output/compositor_frame_metadata.h
@@ -10,12 +10,13 @@
 #include <vector>
 
 #include "cc/base/cc_export.h"
-#include "cc/output/viewport_selection_bound.h"
+#include "cc/input/selection.h"
 #include "cc/surfaces/surface_id.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/events/latency_info.h"
 #include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/geometry/vector2d_f.h"
+#include "ui/gfx/selection_bound.h"
 
 namespace cc {
 
@@ -54,7 +55,7 @@ class CC_EXPORT CompositorFrameMetadata {
 
   // Provides selection region updates relative to the current viewport. If the
   // selection is empty or otherwise unused, the bound types will indicate such.
-  ViewportSelection selection;
+  Selection<gfx::SelectionBound> selection;
 
   std::vector<ui::LatencyInfo> latency_info;