Move discardable memory to //components from //content

content/child/child_thread_impl.h

Index: content/child/child_thread_impl.h
diff --git a/content/child/child_thread_impl.h b/content/child/child_thread_impl.h
index 590c1ff3e8e01387fa6104bb6c17e8b5620201a9..8a957086bd246018825f2e2d629a37149d83d835 100644
--- a/content/child/child_thread_impl.h
+++ b/content/child/child_thread_impl.h
@@ -52,9 +52,12 @@ namespace blink {
 class WebFrame;
 }  // namespace blink
 
+namespace discardable_memory {
+class ChildDiscardableSharedMemoryManager;
+}  // namespace discardable_memory
+
 namespace content {
 class ChildMessageFilter;
-class ChildDiscardableSharedMemoryManager;
 class ChildHistogramMessageFilter;
 class ChildResourceMessageFilter;
 class ChildSharedBitmapManager;
@@ -142,8 +145,8 @@ class CONTENT_EXPORT ChildThreadImpl
     return shared_bitmap_manager_.get();
   }
 
-  ChildDiscardableSharedMemoryManager* discardable_shared_memory_manager()
-      const {
+  discardable_memory::ChildDiscardableSharedMemoryManager*
+  discardable_shared_memory_manager() const {
     return discardable_shared_memory_manager_.get();
   }
 
@@ -244,6 +247,8 @@ class CONTENT_EXPORT ChildThreadImpl
     IPC::Sender* const sender_;
   };
 
+  class ChildDiscardableSharedMemoryManagerDelegate;
+
   void Init(const Options& options);
 
   // We create the channel first without connecting it so we can add filters
@@ -331,9 +336,12 @@ class CONTENT_EXPORT ChildThreadImpl
 
   std::unique_ptr<ChildSharedBitmapManager> shared_bitmap_manager_;
 
-  std::unique_ptr<ChildDiscardableSharedMemoryManager>
+  std::unique_ptr<discardable_memory::ChildDiscardableSharedMemoryManager>
       discardable_shared_memory_manager_;
 
+  std::unique_ptr<ChildDiscardableSharedMemoryManagerDelegate>
+      child_discardable_shared_memory_manager_delegate_;
+
   std::unique_ptr<base::PowerMonitor> power_monitor_;
 
   scoped_refptr<base::SequencedTaskRunner> browser_process_io_runner_;