cc: Do not add already failed image decode tasks as dependencies.

cc/tiles/gpu_image_decode_controller.cc

Index: cc/tiles/gpu_image_decode_controller.cc
diff --git a/cc/tiles/gpu_image_decode_controller.cc b/cc/tiles/gpu_image_decode_controller.cc
index b6daab4ccfeac4a8a627aa6973ee84438ee20dc7..ded8205fa33125c64f7ad9c27516b2f7b92cf2dd 100644
--- a/cc/tiles/gpu_image_decode_controller.cc
+++ b/cc/tiles/gpu_image_decode_controller.cc
@@ -191,6 +191,12 @@ bool GpuImageDecodeController::GetTaskForImageAndRef(
       return false;
     }
 
+    if (image_data->decode.decode_failure) {
+      // We have already tried and failed to decode this image, so just return.
+      *task = nullptr;
+      return false;
+    }
+
     if (image_data->upload.image) {
       // The image is already uploaded, ref and return.
       RefImage(draw_image);