Implement CompositorFrame Struct Traits

cc/ipc/compositor_frame_metadata_struct_traits.h

Index: cc/ipc/compositor_frame_metadata_struct_traits.h
diff --git a/cc/ipc/compositor_frame_metadata_struct_traits.h b/cc/ipc/compositor_frame_metadata_struct_traits.h
index c7e4f46897392e48b8affdec28c4d77be2a01fe1..fedd13ef8673eac64743e0cacb18b4b27443c53b 100644
--- a/cc/ipc/compositor_frame_metadata_struct_traits.h
+++ b/cc/ipc/compositor_frame_metadata_struct_traits.h
@@ -93,36 +93,7 @@ struct StructTraits<cc::mojom::CompositorFrameMetadata,
   }
 
   static bool Read(cc::mojom::CompositorFrameMetadataDataView data,
-                   cc::CompositorFrameMetadata* out) {
-    out->device_scale_factor = data.device_scale_factor();
-    if (!data.ReadRootScrollOffset(&out->root_scroll_offset))
-      return false;
-
-    out->page_scale_factor = data.page_scale_factor();
-    if (!data.ReadScrollableViewportSize(&out->scrollable_viewport_size) ||
-        !data.ReadRootLayerSize(&out->root_layer_size)) {
-      return false;
-    }
-
-    out->min_page_scale_factor = data.min_page_scale_factor();
-    out->max_page_scale_factor = data.max_page_scale_factor();
-    out->root_overflow_x_hidden = data.root_overflow_x_hidden();
-    out->root_overflow_y_hidden = data.root_overflow_y_hidden();
-    if (!data.ReadLocationBarOffset(&out->location_bar_offset) ||
-        !data.ReadLocationBarContentTranslation(
-            &out->location_bar_content_translation)) {
-      return false;
-    }
-
-    out->root_background_color = data.root_background_color();
-    if (!data.ReadSelection(&out->selection) ||
-        !data.ReadLatencyInfo(&out->latency_info) ||
-        !data.ReadSatisfiesSequences(&out->satisfies_sequences) ||
-        !data.ReadReferencedSurfaces(&out->referenced_surfaces)) {
-      return false;
-    }
-    return true;
-  }
+                   cc::CompositorFrameMetadata* out);
 };
 
 }  // namespace mojo