cc: Partial tile update for one-copy raster.

cc/resources/display_list_raster_source.cc

Index: cc/resources/display_list_raster_source.cc
diff --git a/cc/resources/display_list_raster_source.cc b/cc/resources/display_list_raster_source.cc
index 8a2df82a877f4365fb65f29b487429f2d627165b..3ab70a80ebec4bd2554555306938f1d3d20b2d24 100644
--- a/cc/resources/display_list_raster_source.cc
+++ b/cc/resources/display_list_raster_source.cc
@@ -98,10 +98,11 @@ void DisplayListRasterSource::RasterForAnalysis(skia::AnalysisCanvas* canvas,
 
 void DisplayListRasterSource::PlaybackToCanvas(SkCanvas* canvas,
                                                const gfx::Rect& canvas_rect,
-                                               float contents_scale) const {
+                                               float contents_scale,
+                                               bool partial_update) const {
   RasterSourceHelper::PrepareForPlaybackToCanvas(
       canvas, canvas_rect, gfx::Rect(size_), contents_scale, background_color_,
-      clear_canvas_with_debug_color_, requires_clear_);
+      clear_canvas_with_debug_color_, requires_clear_, partial_update);
 
   RasterCommon(canvas, NULL, canvas_rect, contents_scale);
 }
@@ -129,7 +130,8 @@ skia::RefPtr<SkPicture> DisplayListRasterSource::GetFlattenedPicture() {
   SkCanvas* canvas = recorder.beginRecording(display_list_rect.width(),
                                              display_list_rect.height());
   if (!display_list_rect.IsEmpty())

[piman, 2015/05/14 19:50:46]

nit: {}

[danakj, 2015/05/14 22:03:42]

Undone.

-    PlaybackToCanvas(canvas, display_list_rect, 1.0);
+    PlaybackToCanvas(canvas, display_list_rect, 1.0,
+                     false /* partial_update */);
   skia::RefPtr<SkPicture> picture =
       skia::AdoptRef(recorder.endRecordingAsPicture());