Implements core logic for Pixel Canvas

ui/compositor/canvas_painter.cc

Index: ui/compositor/canvas_painter.cc
diff --git a/ui/compositor/canvas_painter.cc b/ui/compositor/canvas_painter.cc
index a12e85ab06efe118dfddcef8d0cac1ca04b90f4a..def2fc6d5ec7b520a39f4293a2c650818269cbbc 100644
--- a/ui/compositor/canvas_painter.cc
+++ b/ui/compositor/canvas_painter.cc
@@ -17,7 +17,8 @@ CanvasPainter::CanvasPainter(SkBitmap* output,
       raster_scale_(raster_scale),
       clear_color_(clear_color),
       list_(new cc::DisplayItemList),
-      context_(list_.get(), raster_scale, gfx::Rect(paint_size_)) {}
+      context_(list_.get(), raster_scale, gfx::Rect(paint_size_), paint_size_) {
+}
 
 CanvasPainter::~CanvasPainter() {
   gfx::Size pixel_size = gfx::ScaleToCeiledSize(paint_size_, raster_scale_);