Remove parts of //cc we aren't using

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 e92a84df648c9027b48d2f75034d48c9d45d9f14..9f6df95e422cd8cbd8a76dfbc5fac2a5dce4f347 100644
--- a/cc/output/compositor_frame_metadata.h
+++ b/cc/output/compositor_frame_metadata.h
@@ -7,15 +7,13 @@
 
 #include <vector>
 
-#include "cc/base/cc_export.h"
-#include "cc/output/viewport_selection_bound.h"
 #include "ui/events/latency_info.h"
 #include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
 namespace cc {
 
-class CC_EXPORT CompositorFrameMetadata {
+class CompositorFrameMetadata {
  public:
   CompositorFrameMetadata();
   ~CompositorFrameMetadata();
@@ -42,11 +40,6 @@ class CC_EXPORT CompositorFrameMetadata {
   gfx::Vector2dF location_bar_offset;
   gfx::Vector2dF location_bar_content_translation;
 
-  // Provides selection region updates relative to the current viewport. If the
-  // selection is empty or otherwise unused, the bound types will indicate such.
-  ViewportSelectionBound selection_start;
-  ViewportSelectionBound selection_end;
-
   std::vector<ui::LatencyInfo> latency_info;
 
   // A set of SurfaceSequences that this frame satisfies (always in the same