const ref

Author: dkwingsmt

shell/common/rasterizer.h

@@ -121,7 +121,7 @@ class Rasterizer final : public SnapshotDelegate,
     virtual const Settings& GetSettings() const = 0;
 
     virtual bool ShouldDiscardLayerTree(int64_t view_id,
-                                        flutter::LayerTree& tree) = 0;
+                                        const flutter::LayerTree& tree) = 0;
   };
 
   //----------------------------------------------------------------------------

shell/common/rasterizer_unittests.cc

@@ -43,7 +43,8 @@ class MockDelegate : public Rasterizer::Delegate {
   MOCK_CONST_METHOD0(GetIsGpuDisabledSyncSwitch,
                      std::shared_ptr<const fml::SyncSwitch>());
   MOCK_CONST_METHOD0(GetSettings, const Settings&());
-  MOCK_METHOD2(ShouldDiscardLayerTree, bool(int64_t, flutter::LayerTree&));
+  MOCK_METHOD2(ShouldDiscardLayerTree,
+               bool(int64_t, const flutter::LayerTree&));
 };
 
 class MockSurface : public Surface {

shell/common/shell.cc

@@ -1584,7 +1584,8 @@ fml::TimePoint Shell::GetLatestFrameTargetTime() const {
 }
 
 // |Rasterizer::Delegate|
-bool Shell::ShouldDiscardLayerTree(int64_t view_id, flutter::LayerTree& tree) {
+bool Shell::ShouldDiscardLayerTree(int64_t view_id,
+                                   const flutter::LayerTree& tree) {
   std::scoped_lock<std::mutex> lock(resize_mutex_);
   auto expected_frame_size = ExpectedFrameSize(view_id);
   return !expected_frame_size.isEmpty() &&

shell/common/shell.h

@@ -695,7 +695,7 @@ class Shell final : public PlatformView::Delegate,
 
   // |Rasterizer::Delegate|
   bool ShouldDiscardLayerTree(int64_t view_id,
-                              flutter::LayerTree& tree) override;
+                              const flutter::LayerTree& tree) override;
 
   // |ServiceProtocol::Handler|
   fml::RefPtr<fml::TaskRunner> GetServiceProtocolHandlerTaskRunner(