cc: Make images that can't possibly fit in cache not checker.

cc/tiles/gpu_image_decode_cache.h

Index: cc/tiles/gpu_image_decode_cache.h
diff --git a/cc/tiles/gpu_image_decode_cache.h b/cc/tiles/gpu_image_decode_cache.h
index 391f048c2e98da981d4c3f8fe180a4c6efcac9db..4ec9b7b2461c7419380f010f28f54c665bacb9ca 100644
--- a/cc/tiles/gpu_image_decode_cache.h
+++ b/cc/tiles/gpu_image_decode_cache.h
@@ -125,6 +125,7 @@ class CC_EXPORT GpuImageDecodeCache
   void SetShouldAggressivelyFreeResources(
       bool aggressively_free_resources) override;
   void ClearCache() override;
+  size_t GetMaximumMemoryLimit() const override;
 
   // MemoryDumpProvider overrides.
   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
@@ -347,6 +348,8 @@ class CC_EXPORT GpuImageDecodeCache
   sk_sp<GrContextThreadSafeProxy> context_threadsafe_proxy_;
 
   // All members below this point must only be accessed while holding |lock_|.
+  // The exception are const members like |normal_max_cache_bytes_| that can
+  // be accessed without a lock since they are thread safe.
   base::Lock lock_;
 
   // |persistent_cache_| represents the long-lived cache, keeping a certain