cc: Remove separate x/y raster scales.

cc/raster/raster_buffer_provider.cc

Index: cc/raster/raster_buffer_provider.cc
diff --git a/cc/raster/raster_buffer_provider.cc b/cc/raster/raster_buffer_provider.cc
index 587a39ba0b1ba7abb2236c5c40aa5694ace90801..20264a7211336edb062c388fad2b9d430a42a6f4 100644
--- a/cc/raster/raster_buffer_provider.cc
+++ b/cc/raster/raster_buffer_provider.cc
@@ -51,7 +51,7 @@ void RasterBufferProvider::PlaybackToMemory(
     const RasterSource* raster_source,
     const gfx::Rect& canvas_bitmap_rect,
     const gfx::Rect& canvas_playback_rect,
-    const gfx::SizeF& scales,
+    float scale,
     sk_sp<SkColorSpace> dst_color_space,
     const RasterSource::PlaybackSettings& playback_settings) {
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("cc.debug"),
@@ -80,7 +80,7 @@ void RasterBufferProvider::PlaybackToMemory(
       sk_sp<SkSurface> surface =
           SkSurface::MakeRasterDirect(info, memory, stride, &surface_props);
       raster_source->PlaybackToCanvas(surface->getCanvas(), canvas_bitmap_rect,
-                                      canvas_playback_rect, scales,
+                                      canvas_playback_rect, scale,
                                       playback_settings);
       return;
     }
@@ -90,7 +90,7 @@ void RasterBufferProvider::PlaybackToMemory(
       // TODO(reveman): Improve partial raster support by reducing the size of
       // playback rect passed to PlaybackToCanvas. crbug.com/519070
       raster_source->PlaybackToCanvas(surface->getCanvas(), canvas_bitmap_rect,
-                                      canvas_bitmap_rect, scales,
+                                      canvas_bitmap_rect, scale,
                                       playback_settings);
 
       if (format == ETC1) {