[Experimental] Supporting OOPIF printing

content/browser/frame_host/render_frame_proxy_host.cc

Index: content/browser/frame_host/render_frame_proxy_host.cc
diff --git a/content/browser/frame_host/render_frame_proxy_host.cc b/content/browser/frame_host/render_frame_proxy_host.cc
index e0d773bff7bebc04d3d1a1ca7a88758a0640fae8..eaa865ccc31e593c85c1b1bd6c9784329453e37d 100644
--- a/content/browser/frame_host/render_frame_proxy_host.cc
+++ b/content/browser/frame_host/render_frame_proxy_host.cc
@@ -21,6 +21,9 @@
 #include "content/common/frame_messages.h"
 #include "content/common/frame_owner_properties.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
+#include "content/public/browser/print_subframe_details.h"
 #include "ipc/ipc_message.h"
 
 namespace content {
@@ -139,6 +142,7 @@ bool RenderFrameProxyHost::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidChangeOpener, OnDidChangeOpener)
     IPC_MESSAGE_HANDLER(FrameHostMsg_AdvanceFocus, OnAdvanceFocus)
     IPC_MESSAGE_HANDLER(FrameHostMsg_FrameFocused, OnFrameFocused)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_PrintRemoteFrame, OnPrintRemoteFrame)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -372,4 +376,18 @@ void RenderFrameProxyHost::OnFrameFocused() {
       frame_tree_node_, GetSiteInstance());
 }
 
+void RenderFrameProxyHost::OnPrintRemoteFrame(const gfx::Rect& rect,
+                                              int page_num) {
+  RenderFrameHostImpl* target_rfh =
+      frame_tree_node_->render_manager()->current_frame_host();
+
+  PrintSubframeDetails details(page_num, GetRoutingID());
+  NotificationService::current()->Notify(
+      NOTIFICATION_PRINT_SUBFRAME_BEGIN,
+      content::Source<RenderFrameProxyHost>(this),
+      content::Details<PrintSubframeDetails>(&details));
+  target_rfh->Send(
+      new FrameMsg_PrintFrame(target_rfh->GetRoutingID(), rect, page_num));
+}
+
 }  // namespace content