pdf: Create a separate component for using the pdf pepper plugin.

components/pdf/browser/pdf_web_contents_helper.cc

+// Copyright (c) 2012 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 "components/pdf/browser/pdf_web_contents_helper.h"
+
+#include "base/bind.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/pdf/browser/open_pdf_in_reader_prompt_client.h"
+#include "components/pdf/browser/pdf_web_contents_helper_client.h"
+#include "components/pdf/common/pdf_messages.h"
+#include "content/public/browser/navigation_details.h"
+
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(pdf::PDFWebContentsHelper);
+
+namespace pdf {
+
+// static
+void PDFWebContentsHelper::CreateForWebContentsWithClient(
+    content::WebContents* contents,
+    scoped_ptr<PDFWebContentsHelperClient> client) {
+  if (FromWebContents(contents))
+    return;
+  contents->SetUserData(UserDataKey(),
+                        new PDFWebContentsHelper(contents, client.Pass()));
+}
+
+PDFWebContentsHelper::PDFWebContentsHelper(
+    content::WebContents* web_contents,
+    scoped_ptr<PDFWebContentsHelperClient> client)
+    : content::WebContentsObserver(web_contents), client_(client.Pass()) {
+}
+
+PDFWebContentsHelper::~PDFWebContentsHelper() {
+}
+
+void PDFWebContentsHelper::ShowOpenInReaderPrompt(
+    scoped_ptr<OpenPDFInReaderPromptClient> prompt) {
+  open_in_reader_prompt_ = prompt.Pass();
+  UpdateLocationBar();
+}
+
+bool PDFWebContentsHelper::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PDFWebContentsHelper, message)
+  IPC_MESSAGE_HANDLER(PDFHostMsg_PDFHasUnsupportedFeature,

[Tom Sepez, 2014/08/27 17:24:49]

nit: generally, we indent the IPC_MESSAGE_HANDLER/UNHANDLED() macros 2 more
spaces than the surrounding IPC_BEGIN/END_MESSAGE_MAP() macros.

[sadrul, 2014/08/27 23:39:20]

Done, sorry. I addressed this in an earlier patchset too, but git cl-format
keeps undoing it.

+                      OnHasUnsupportedFeature)
+  IPC_MESSAGE_HANDLER(PDFHostMsg_PDFSaveURLAs, OnSaveURLAs)
+  IPC_MESSAGE_HANDLER(PDFHostMsg_PDFUpdateContentRestrictions,
+                      OnUpdateContentRestrictions)
+  IPC_MESSAGE_HANDLER_DELAY_REPLY(PDFHostMsg_PDFModalPromptForPassword,
+                                  OnModalPromptForPassword)
+  IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void PDFWebContentsHelper::DidNavigateMainFrame(
+    const content::LoadCommittedDetails& details,
+    const content::FrameNavigateParams& params) {
+  if (open_in_reader_prompt_.get() &&
+      open_in_reader_prompt_->ShouldExpire(details)) {
+    open_in_reader_prompt_.reset();
+    UpdateLocationBar();
+  }
+}
+
+void PDFWebContentsHelper::UpdateLocationBar() {
+  client_->UpdateLocationBar(web_contents());
+}
+
+void PDFWebContentsHelper::OnHasUnsupportedFeature() {
+  client_->OnPDFHasUnsupportedFeature(web_contents());
+}
+
+void PDFWebContentsHelper::OnSaveURLAs(const GURL& url,
+                                       const content::Referrer& referrer) {
+  client_->OnSaveURL(web_contents());
+  web_contents()->SaveFrame(url, referrer);
+}
+
+void PDFWebContentsHelper::OnUpdateContentRestrictions(
+    int content_restrictions) {
+  client_->UpdateContentRestrictions(web_contents(), content_restrictions);
+}
+
+void PDFWebContentsHelper::OnModalPromptForPasswordClosed(
+    IPC::Message* reply_message,
+    bool success,
+    const base::string16& actual_value) {
+  PDFHostMsg_PDFModalPromptForPassword::WriteReplyParams(
+      reply_message, base::UTF16ToUTF8(actual_value));
+  Send(reply_message);
+}
+
+void PDFWebContentsHelper::OnModalPromptForPassword(
+    const std::string& prompt,
+    IPC::Message* reply_message) {
+  base::Callback<void(bool, const base::string16&)> callback =
+      base::Bind(&PDFWebContentsHelper::OnModalPromptForPasswordClosed,
+                 base::Unretained(this),
+                 reply_message);
+  client_->OnShowPDFPasswordDialog(
+      web_contents(), base::UTF8ToUTF16(prompt), callback);
+}
+
+}  // namespace pdf