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 3fb571355b36304c660ce76359d38e5f5c882332..ef6274ca322c39190cac7ad0ddbe12080418c7e9 100644
--- a/cc/raster/raster_buffer_provider_unittest.cc
+++ b/cc/raster/raster_buffer_provider_unittest.cc
@@ -75,10 +75,14 @@ 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: