Implement CompositorFrame Struct Traits

cc/ipc/compositor_frame_metadata_struct_traits.h

 // 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.
 
 #ifndef CC_IPC_COMPOSITOR_FRAME_METADATA_STRUCT_TRAITS_H_
 #define CC_IPC_COMPOSITOR_FRAME_METADATA_STRUCT_TRAITS_H_
 
 #include "cc/ipc/compositor_frame_metadata.mojom.h"
 #include "cc/output/compositor_frame_metadata.h"
 
@@ skipping 75 matching lines @@
       const cc::CompositorFrameMetadata& metadata) {
     return metadata.satisfies_sequences;
   }
 
   static const std::vector<cc::SurfaceId>& referenced_surfaces(
       const cc::CompositorFrameMetadata& metadata) {
     return metadata.referenced_surfaces;
   }
 
   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
 
 #endif  // CC_IPC_COMPOSITOR_FRAME_METADATA_STRUCT_TRAITS_H_