Clear Image Decode Cache on Navigation

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 40cfdfd14a95a54b874725eaefb21aead859bc82..303343de13da360e999460f990644f75b0bbf9a7 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -2344,6 +2344,12 @@ LayerTreeHostImpl::TakeCompletedImageDecodeCallbacks() {
   return result;
 }
 
+void LayerTreeHostImpl::ClearCachesOnNavigation() {

[vmpstr, 2017/04/03 18:46:11]

Maybe ClearImageCacheOnNavigation?

[ericrk, 2017/04/04 00:26:03]

I was thinking maybe we'd want to use it for other things in the future - but I
guess we can re-name it if/when that happens :D - changed.

+  if (image_decode_cache_) {
+    image_decode_cache_->ClearCache();
+  }
+}
+
 void LayerTreeHostImpl::DidChangeScrollbarVisibility() {
   // Need a commit since input handling for scrollbars is handled in Blink so
   // we need to communicate to Blink when the compositor shows/hides the