pdf: Move PepperPDFHost into the pdf component.

chrome/renderer/pepper/chrome_pdf_print_client.cc

 // Copyright 2014 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.
 
 #include "chrome/renderer/pepper/chrome_pdf_print_client.h"
 
 #include "chrome/renderer/printing/print_web_view_helper.h"
 #include "content/public/renderer/pepper_plugin_instance.h"
 #include "content/public/renderer/render_view.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
@@ skipping 26 matching lines @@
 }
 ChromePDFPrintClient::~ChromePDFPrintClient() {
 }
 
 bool ChromePDFPrintClient::IsPrintingEnabled(PP_Instance instance_id) {
   blink::WebElement element = GetWebElement(instance_id);
   printing::PrintWebViewHelper* helper = GetPrintWebViewHelper(element);
   return helper && helper->IsPrintingEnabled();
 }
 
-void ChromePDFPrintClient::Print(PP_Instance instance_id) {
+bool ChromePDFPrintClient::Print(PP_Instance instance_id) {
   blink::WebElement element = GetWebElement(instance_id);
   printing::PrintWebViewHelper* helper = GetPrintWebViewHelper(element);
-  if (helper)
+  if (helper) {
     helper->PrintNode(element);
+    return true;
+  }
+  return false;
 }