cc: Interface to evict images from cc image decode cache.

cc/tiles/software_image_decode_cache.cc

Index: cc/tiles/software_image_decode_cache.cc
diff --git a/cc/tiles/software_image_decode_cache.cc b/cc/tiles/software_image_decode_cache.cc
index 3a27f3bf30d3b781160b08ca2013a637c58319d0..17502355be29b9a660b6de0bc95b163a3be987e2 100644
--- a/cc/tiles/software_image_decode_cache.cc
+++ b/cc/tiles/software_image_decode_cache.cc
@@ -853,6 +853,10 @@ size_t SoftwareImageDecodeCache::GetMaximumMemoryLimitBytes() const {
   return locked_images_budget_.total_limit_bytes();
 }
 
+void SoftwareImageDecodeCache::NotifyImageUnused(uint32_t skimage_id) {
+  // TODO(sohanjg) :Implement it.

[vmpstr, 2017/06/19 16:34:42]

Can you reference a bug here?

[sohan, 2017/06/20 13:31:39]

Done.

+}
+
 void SoftwareImageDecodeCache::RemovePendingTask(const ImageKey& key,
                                                  DecodeTaskType task_type) {
   base::AutoLock lock(lock_);