Fix MultiPictureDraw issues with GpuImageDecodeController

cc/raster/raster_buffer_provider_unittest.cc

Index: cc/raster/raster_buffer_provider_unittest.cc
diff --git a/cc/raster/raster_buffer_provider_unittest.cc b/cc/raster/raster_buffer_provider_unittest.cc
index ffdb710b0e43df2048a2b7f86ab6af2d8edff3d6..e07018f220e72ff3325d2910c380cd63de2e7696 100644
--- a/cc/raster/raster_buffer_provider_unittest.cc
+++ b/cc/raster/raster_buffer_provider_unittest.cc
@@ -65,10 +65,14 @@ class TestRasterTaskImpl : public TileTask {
 
   // Overridden from Task:
   void RunOnWorkerThread() override {
+    // Don't use the image hijack canvas for these tests, as they have no image
+    // decode controller.
+    RasterSource::PlaybackSettings settings;
+    settings.use_image_hijack_canvas = false;
+
     uint64_t new_content_id = 0;
     raster_buffer_->Playback(raster_source_.get(), gfx::Rect(1, 1),
-                             gfx::Rect(1, 1), new_content_id, 1.f,
-                             RasterSource::PlaybackSettings());
+                             gfx::Rect(1, 1), new_content_id, 1.f, settings);
   }
 
   // Overridden from TileTask: