Fix DCHECK in createTransparentSkImage

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index b0f92dbd71f8906be13a81d75d3a2bb25e3b4cf7..fe9be298adabee153e3c380ff4ec19fb40d1f11c 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -112,7 +112,8 @@ const int MaxGlobalGPUMemoryUsage =
 const int UndefinedQualityValue = -1.0;
 
 sk_sp<SkImage> createTransparentSkImage(const IntSize& size) {
-  DCHECK(ImageBuffer::canCreateImageBuffer(size));
+  if (!ImageBuffer::canCreateImageBuffer(size))
+    return nullptr;
   sk_sp<SkSurface> surface =
       SkSurface::MakeRasterN32Premul(size.width(), size.height());
   return surface ? surface->makeImageSnapshot() : nullptr;