1 files changed, 8 insertions, 0 deletions
diff --git a/chrome/renderer/render_widget.cc b/chrome/renderer/render_widget.cc
index 5332d74..6d43982 100644
--- a/chrome/renderer/render_widget.cc
+++ b/chrome/renderer/render_widget.cc
@@ -367,6 +367,10 @@ void RenderWidget::DoDeferredPaint() {
     return;
   }
 
+  // We may get back a smaller canvas than we asked for.
+  damaged_rect.set_width(canvas->getDevice()->width());
+  damaged_rect.set_height(canvas->getDevice()->height());
+
   PaintRect(damaged_rect, canvas);
 
   ViewHostMsg_PaintRect_Params params;
@@ -445,6 +449,10 @@ void RenderWidget::DoDeferredScroll() {
     return;
   }
 
+  // We may get back a smaller canvas than we asked for.
+  damaged_rect.set_width(canvas->getDevice()->width());
+  damaged_rect.set_height(canvas->getDevice()->height());
+
   // Set these parameters before calling Paint, since that could result in
   // further invalidates (uncommon).
   ViewHostMsg_ScrollRect_Params params;