Linux: Flush cairo surface at end of CanvasPaintLinux.

skia/ext/canvas_paint_linux.h

Index: skia/ext/canvas_paint_linux.h
diff --git a/skia/ext/canvas_paint_linux.h b/skia/ext/canvas_paint_linux.h
index af4314199cf91c112cd7c89da3d564eb9f50ab1f..d2dc77630738db6938f51b42458bc143b40385ba 100644
--- a/skia/ext/canvas_paint_linux.h
+++ b/skia/ext/canvas_paint_linux.h
@@ -49,6 +49,8 @@ class CanvasPaintT : public T {
         cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
       cairo_surface_t* source_surface = cairo_get_target(context_);
       CHECK(source_surface);
+      // Flush cairo's cache of the surface.
+      cairo_surface_mark_dirty(source_surface);
       GdkRectangle bounds = rectangle();
       cairo_set_source_surface(cr, source_surface, bounds.x, bounds.y);
       gdk_cairo_region(cr, region_);
@@ -83,7 +85,7 @@ class CanvasPaintT : public T {
     GdkRectangle bounds = rectangle();
     if (!T::initialize(bounds.width, bounds.height, opaque, NULL)) {
       // Cause a deliberate crash;
-      *(char*) 0 = 0;
+      CHECK(false);
     }
 
     // Need to translate so that the dirty region appears at the origin of the