Convert PDF component IPC to mojo.

components/pdf/renderer/pepper_pdf_host.cc

Index: components/pdf/renderer/pepper_pdf_host.cc
diff --git a/components/pdf/renderer/pepper_pdf_host.cc b/components/pdf/renderer/pepper_pdf_host.cc
index af5469363a0f1487833bbabc8790333decf1ef1a..abf3114f43133d806590c7b86e0da694c470af4b 100644
--- a/components/pdf/renderer/pepper_pdf_host.cc
+++ b/components/pdf/renderer/pepper_pdf_host.cc
@@ -5,8 +5,8 @@
 #include "components/pdf/renderer/pepper_pdf_host.h"
 
 #include "base/memory/ptr_util.h"
-#include "components/pdf/common/pdf_messages.h"
 #include "components/pdf/renderer/pdf_accessibility_tree.h"
+#include "content/public/common/associated_interface_provider.h"
 #include "content/public/common/referrer.h"
 #include "content/public/renderer/pepper_plugin_instance.h"
 #include "content/public/renderer/render_frame.h"
@@ -122,8 +122,7 @@ int32_t PepperPDFHost::OnHostMsgSetContentRestriction(
   if (!render_frame)
     return PP_ERROR_FAILED;
 
-  render_frame->Send(new PDFHostMsg_PDFUpdateContentRestrictions(
-      render_frame->GetRoutingID(), restrictions));
+  GetRemotePDFService()->UpdateContentRestrictions(restrictions);
   return PP_OK;
 }
 
@@ -142,8 +141,7 @@ int32_t PepperPDFHost::OnHostMsgHasUnsupportedFeature(
   if (!render_frame)
     return PP_ERROR_FAILED;
 
-  render_frame->Send(
-      new PDFHostMsg_PDFHasUnsupportedFeature(render_frame->GetRoutingID()));
+  GetRemotePDFService()->HasUnsupportedFeature();
   return PP_OK;
 }
 
@@ -168,8 +166,7 @@ int32_t PepperPDFHost::OnHostMsgSaveAs(
   referrer.url = url;
   referrer.policy = blink::WebReferrerPolicyDefault;
   referrer = content::Referrer::SanitizeForRequest(url, referrer);
-  render_frame->Send(
-      new PDFHostMsg_PDFSaveURLAs(render_frame->GetRoutingID(), url, referrer));
+  GetRemotePDFService()->SaveURLAs(url, referrer);
   return PP_OK;
 }
 
@@ -241,4 +238,12 @@ content::RenderFrame* PepperPDFHost::GetRenderFrame() {
   return instance ? instance->GetRenderFrame() : nullptr;
 }
 
+mojom::PDFService* PepperPDFHost::GetRemotePDFService() {
+  if (!remote_pdf_service_) {
+    GetRenderFrame()->GetRemoteAssociatedInterfaces()->GetInterface(
+        &remote_pdf_service_);
+  }
+  return remote_pdf_service_.get();
+}
+
 }  // namespace pdf