Use pdf compositor service for printing when OOPIF is enabled

components/printing/browser/print_composite_client.h

Index: components/printing/browser/print_composite_client.h
diff --git a/components/printing/browser/print_composite_client.h b/components/printing/browser/print_composite_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..86b403fdefcd4e7041c7932de6982688b0f361ca
--- /dev/null
+++ b/components/printing/browser/print_composite_client.h
@@ -0,0 +1,46 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_PRINTING_BROWSER_PRINT_COMPOSITE_CLIENT_H_
+#define COMPONENTS_PRINTING_BROWSER_PRINT_COMPOSITE_CLIENT_H_
+
+#include "base/memory/ref_counted_memory.h"
+#include "base/memory/shared_memory.h"
+#include "base/memory/shared_memory_handle.h"
+#include "components/printing/service/public/cpp/pdf_compositor_client.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+namespace printing {
+
+class PrintCompositeClient
+    : public PdfCompositorClient,
+      public content::WebContentsObserver,

[Lei Zhang, 2017/09/08 07:50:53]

Is this class actually a WebContentsObserver?

[Wei Li, 2017/09/08 22:57:47]

Done.

+      public content::WebContentsUserData<PrintCompositeClient> {
+ public:
+  explicit PrintCompositeClient(content::WebContents* web_contents);
+  ~PrintCompositeClient() override;
+
+  void CreateConnectorRequest();

[Lei Zhang, 2017/09/08 07:50:53]

private

[Wei Li, 2017/09/08 22:57:48]

Done.

+  void DoComposite(base::SharedMemoryHandle handle,
+                   uint32_t data_size,
+                   mojom::PdfCompositor::CompositePdfCallback callback);
+
+  // Utility functions.
+  static std::unique_ptr<base::SharedMemory> GetShmFromMojoHandle(
+      mojo::ScopedSharedBufferHandle handle);
+  static scoped_refptr<base::RefCountedBytes> GetDataFromMojoHandle(
+      mojo::ScopedSharedBufferHandle handle);
+
+ private:
+  service_manager::mojom::ConnectorRequest connector_request_;
+  std::unique_ptr<service_manager::Connector> connector_;
+  base::WeakPtrFactory<PrintCompositeClient> weak_factory_;

[Lei Zhang, 2017/09/08 07:50:53]

Not used?

[Wei Li, 2017/09/08 22:57:48]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(PrintCompositeClient);
+};
+
+}  // namespace printing
+
+#endif  // COMPONENTS_PRINTING_BROWSER_PRINT_COMPOSITE_CLIENT_H_