[Experimental] Supporting OOPIF printing

chrome/browser/printing/print_preview_message_handler.h

Index: chrome/browser/printing/print_preview_message_handler.h
diff --git a/chrome/browser/printing/print_preview_message_handler.h b/chrome/browser/printing/print_preview_message_handler.h
index ba7102008ba757b99ccff509e0f5e00690d97321..af76bd32811ae2770df6b942ae61177bd30840b4 100644
--- a/chrome/browser/printing/print_preview_message_handler.h
+++ b/chrome/browser/printing/print_preview_message_handler.h
@@ -9,6 +9,7 @@
 #include "base/macros.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
+#include "mojo/public/cpp/system/buffer.h"
 
 class PrintPreviewUI;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
@@ -28,6 +29,7 @@ class Rect;
 
 namespace printing {
 
+class PrintCompositeClient;
 struct PageSizeMargins;
 
 // Manages the print preview handling for a WebContents.
@@ -41,6 +43,14 @@ class PrintPreviewMessageHandler
   bool OnMessageReceived(const IPC::Message& message,
                          content::RenderFrameHost* render_frame_host) override;
 
+  void OnCompositePdfPageDone(int page_number,
+                              int request_id,
+                              mojo::ScopedSharedBufferHandle handle);
+
+  void OnCompositePdfDocumentDone(int page_count,
+                                  int request_id,
+                                  mojo::ScopedSharedBufferHandle handle);
+
  private:
   explicit PrintPreviewMessageHandler(content::WebContents* web_contents);
   friend class content::WebContentsUserData<PrintPreviewMessageHandler>;
@@ -61,8 +71,10 @@ class PrintPreviewMessageHandler
                                  bool has_custom_page_size_style);
   void OnDidGetPreviewPageCount(
       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
-  void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);
+  void OnDidPreviewPage(content::RenderFrameHost* render_frame_host,
+                        const PrintHostMsg_DidPreviewPage_Params& params);
   void OnMetafileReadyForPrinting(
+      content::RenderFrameHost* render_frame_host,
       const PrintHostMsg_DidPreviewDocument_Params& params);
   void OnPrintPreviewFailed(int document_cookie);
   void OnPrintPreviewCancelled(int document_cookie);
@@ -70,6 +82,8 @@ class PrintPreviewMessageHandler
   void OnSetOptionsFromDocument(
       const PrintHostMsg_SetOptionsFromDocument_Params& params);
 
+  PrintCompositeClient* composite_client_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewMessageHandler);
 };