Tile Compression

cc/resources/tile.h

Index: cc/resources/tile.h
diff --git a/cc/resources/tile.h b/cc/resources/tile.h
index a35cffe86f5fa0e59c6f4ee9a5566f8eed775e4e..0688db7cbc5c39cb5bd9aa7f044c7f2905de7403 100644
--- a/cc/resources/tile.h
+++ b/cc/resources/tile.h
@@ -19,7 +19,11 @@ class TileManager;
 
 class CC_EXPORT Tile : public RefCountedManaged<Tile> {
  public:
-  enum TileRasterFlags { USE_PICTURE_ANALYSIS = 1 << 0 };
+  enum TileRasterFlags {
+    USE_PICTURE_ANALYSIS = 1 << 0,
+    IS_OPAQUE = 1 << 1,
+    FREQUENTLY_INVALIDATED = 1 << 2
+  };
 
   typedef uint64 Id;
 
@@ -96,6 +100,10 @@ class CC_EXPORT Tile : public RefCountedManaged<Tile> {
     return !!(flags_ & USE_PICTURE_ANALYSIS);
   }
 
+  bool frequently_invalidated() const {
+    return !!(flags_ & FREQUENTLY_INVALIDATED);
+  }
+
   bool HasResources() const { return managed_state_.draw_info.has_resource(); }
   bool NeedsRaster() const {
     return managed_state_.draw_info.mode() ==
@@ -115,6 +123,8 @@ class CC_EXPORT Tile : public RefCountedManaged<Tile> {
 
   ManagedTileState::DrawInfo& draw_info() { return managed_state_.draw_info; }
 
+  bool IsOpaque() const { return !!(flags_ & IS_OPAQUE); }
+
   float contents_scale() const { return contents_scale_; }
   gfx::Rect content_rect() const { return content_rect_; }