From 1a573cf3eb9da16ae1b8fb17c4ed3dea203f5912 Mon Sep 17 00:00:00 2001
From: Adam Barth <abarth@chromium.org>
Date: Mon, 9 Mar 2015 16:19:33 -0700
Subject: [PATCH] SkyShell DCHECKs on startup sometimes

Sometimes we try to draw a 0x0 picture. We shouldn't bother trying to turn a
0x0 picture into actual pixels.

R=eseidel@chromium.org

Review URL: https://codereview.chromium.org/984153004
---
 engine/src/flutter/shell/gpu/rasterizer.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/engine/src/flutter/shell/gpu/rasterizer.cc b/engine/src/flutter/shell/gpu/rasterizer.cc
index d841ea8a478..8fb6836aafc 100644
--- a/engine/src/flutter/shell/gpu/rasterizer.cc
+++ b/engine/src/flutter/shell/gpu/rasterizer.cc
@@ -44,9 +44,13 @@ void Rasterizer::Draw(skia::RefPtr<SkPicture> picture) {
   if (!surface_)
     return;
 
+  gfx::Size size = GetSize(picture.get());
+  if (size.IsEmpty())
+    return;
+
   EnsureGLContext();
   CHECK(context_->MakeCurrent(surface_.get()));
-  EnsureGaneshSurface(GetSize(picture.get()));
+  EnsureGaneshSurface(size);
 
   SkCanvas* canvas = ganesh_surface_->canvas();
   canvas->drawPicture(picture.get());