Revert 277964 "cc: In SyncFromActiveLayer, drop all tiles not in..."

trunk/src/cc/resources/picture_pile.h

Index: trunk/src/cc/resources/picture_pile.h
===================================================================
--- trunk/src/cc/resources/picture_pile.h	(revision 277979)
+++ trunk/src/cc/resources/picture_pile.h	(working copy)
@@ -18,20 +18,17 @@
   PicturePile();
 
   // Re-record parts of the picture that are invalid.
-  // Invalidations are in layer space, and will be expanded to cover everything
-  // that was either recorded/changed or that has no recording, leaving out only
-  // pieces that we had a recording for and it was not changed.
+  // Invalidations are in layer space.
   // Return true iff the pile was modified.
-  bool UpdateAndExpandInvalidation(
-      ContentLayerClient* painter,
-      Region* invalidation,
-      SkColor background_color,
-      bool contents_opaque,
-      bool contents_fill_bounds_completely,
-      const gfx::Rect& visible_layer_rect,
-      int frame_number,
-      Picture::RecordingMode recording_mode,
-      RenderingStatsInstrumentation* stats_instrumentation);
+  bool Update(ContentLayerClient* painter,
+              SkColor background_color,
+              bool contents_opaque,
+              bool contents_fill_bounds_completely,
+              const Region& invalidation,
+              const gfx::Rect& visible_layer_rect,
+              int frame_number,
+              Picture::RecordingMode recording_mode,
+              RenderingStatsInstrumentation* stats_instrumentation);
 
   void set_slow_down_raster_scale_factor(int factor) {
     slow_down_raster_scale_factor_for_debug_ = factor;