return NULL if we failed to allocate a cairo surface, rather than waiting for skia to

skia/ext/bitmap_platform_device_linux.cc

Index: skia/ext/bitmap_platform_device_linux.cc
===================================================================
--- skia/ext/bitmap_platform_device_linux.cc	(revision 148949)
+++ skia/ext/bitmap_platform_device_linux.cc	(working copy)
@@ -99,6 +99,10 @@
   // This initializes the bitmap to all zeros.
   cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
                                                         width, height);
+  if (cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
+    cairo_surface_destroy(surface);
+    return NULL;
+  }
 
   BitmapPlatformDevice* device = Create(width, height, is_opaque, surface);