discardable_memory: Using mojo IPC to replace Chrome IPC

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index f48b60aa94cde3db26ae9df48c191780308b676d..2a9a08fae4d0996dc18e929ac2d965077818128b 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -75,6 +75,10 @@ class CompositorFrameSink;
 class TaskGraphRunner;
 }
 
+namespace discardable_memory {
+class ClientDiscardableSharedMemoryManager;
+}
+
 namespace gpu {
 class GpuChannelHost;
 }
@@ -263,6 +267,11 @@ class CONTENT_EXPORT RenderThreadImpl
     layout_test_deps_ = std::move(deps);
   }
 
+  discardable_memory::ClientDiscardableSharedMemoryManager*
+  GetDiscardableSharedMemoryManagerForTest() {
+    return discardable_shared_memory_manager_.get();
+  }
+
   RendererBlinkPlatformImpl* blink_platform_impl() const {
     DCHECK(blink_platform_impl_);
     return blink_platform_impl_.get();
@@ -545,6 +554,9 @@ class CONTENT_EXPORT RenderThreadImpl
 
   void OnRendererInterfaceRequest(mojom::RendererAssociatedRequest request);
 
+  std::unique_ptr<discardable_memory::ClientDiscardableSharedMemoryManager>
+      discardable_shared_memory_manager_;
+
   // These objects live solely on the render thread.
   std::unique_ptr<AppCacheDispatcher> appcache_dispatcher_;
   std::unique_ptr<DomStorageDispatcher> dom_storage_dispatcher_;