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 96e639337e3cbf50fd60113d3e5b82628fa9e68b..3cc1589f4283e15e187c1098b231ea4fed07f409 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -74,6 +74,10 @@ class CompositorFrameSink;
 class TaskGraphRunner;
 }
 
+namespace discardable_memory {
+class ClientDiscardableSharedMemoryManager;
+}
+
 namespace gpu {
 class GpuChannelHost;
 }
@@ -262,6 +266,11 @@ class CONTENT_EXPORT RenderThreadImpl
     layout_test_deps_ = std::move(deps);
   }
 
+  discardable_memory::ClientDiscardableSharedMemoryManager*
+  discardable_shared_memory_manager() {

[dcheng, 2016/11/25 00:07:08]

It looks like this is only used for testing? It might be nice to add ForTest()
or something to the name.

(Maybe there's no convention of something like that here, but I find it useful
personally to distinguish)

[Peng, 2016/11/25 16:41:53]

Done.

+    return discardable_shared_memory_manager_.get();
+  }
+
   RendererBlinkPlatformImpl* blink_platform_impl() const {
     DCHECK(blink_platform_impl_);
     return blink_platform_impl_.get();
@@ -544,6 +553,9 @@ 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_;