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

Create a component necessary for showing PDF in a content-based client. Much of
the relevant code currently lives in //chrome/, and is usable by chrome. Moving
this code into a separate component in //components/pdf/ allows it to be easily
used by other content-clients (e.g. app-shell, athena, etc.). This patch moves
PPB_PDF_Impl (implementation for the PPB_PDF interface in ppapi) and the
relevant IPC messages in the pdf component.

A short summary of the changes in this patch:
. Move ppb_pdf_impl.cc|h into //components/pdf from //chrome/renderer/pepper
. Put this code in the 'pdf' namespace. This code lives in 'pdf_renderer'
  target. 'chrome_renderer' depends on this target.
. Move the following IPC messages from render_messages.h to pdf_messages.h:
  - PDFUpdateContentRestrictions
  - PDFHasUnsupportedFeature
  - PDFSaveURLAs
  - PDFModalPromptForPassword
 Change the prefix of these messages from ChromeViewHostMsg_ to PDFHostMsg_
. Move PDFTabHelper into //components/pdf from //chrome/browser/ui/pdf.
  Put this code in the 'pdf' namespace. This code lives in 'pdf_browser'
  target. 'chrome_browser' depends on this target.

BUG=401242
R=blundell@chromium.org, raymes@chromium.org, thestig@chromium.org, tsepez@chromium.org
TBR=darin@chromium.org for DEPS

Review URL: https://codereview.chromium.org/477263003

Cr-Commit-Position: refs/heads/master@{#292313}

5 files changed, 279 insertions, 0 deletions

diff --git a/components/pdf/browser/BUILD.gn b/components/pdf/browser/BUILD.gn
new file mode 100644
index 0000000..7434a8f
--- /dev/null
+++ b/components/pdf/browser/BUILD.gn
@@ -0,0 +1,19 @@
+# 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.
+
+import("//build/config/features.gni")
+
+static_library("browser") {
+  sources = [
+    "open_pdf_in_reader_prompt_client.h",
+    "pdf_web_contents_helper.cc",
+    "pdf_web_contents_helper.h",
+    "pdf_web_contents_helper_client.h",
+  ]
+
+  deps = [
+    "//components/pdf/common",
+    "//content/public/browser",
+  ]
+}
diff --git a/components/pdf/browser/open_pdf_in_reader_prompt_client.h b/components/pdf/browser/open_pdf_in_reader_prompt_client.h
new file mode 100644
index 0000000..854e6f4
--- /dev/null
+++ b/components/pdf/browser/open_pdf_in_reader_prompt_client.h
@@ -0,0 +1,36 @@
+// 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.
+
+#ifndef COMPONENTS_PDF_BROWSER_OPEN_PDF_IN_READER_PROMPT_CLIENT_H_
+#define COMPONENTS_PDF_BROWSER_OPEN_PDF_IN_READER_PROMPT_CLIENT_H_
+
+#include "base/strings/string16.h"
+
+namespace content {
+struct LoadCommittedDetails;
+}
+
+namespace pdf {
+
+class OpenPDFInReaderPromptClient {
+ public:
+  virtual ~OpenPDFInReaderPromptClient() {}
+
+  virtual base::string16 GetMessageText() const = 0;
+
+  virtual base::string16 GetAcceptButtonText() const = 0;
+
+  virtual base::string16 GetCancelButtonText() const = 0;
+
+  virtual bool ShouldExpire(
+      const content::LoadCommittedDetails& details) const = 0;
+
+  virtual void Accept() = 0;
+
+  virtual void Cancel() = 0;
+};
+
+}  // namespace pdf
+
+#endif  // COMPONENTS_PDF_BROWSER_OPEN_PDF_IN_READER_PROMPT_CLIENT_H_
diff --git a/components/pdf/browser/pdf_web_contents_helper.cc b/components/pdf/browser/pdf_web_contents_helper.cc
new file mode 100644
index 0000000..59a17a8
--- /dev/null
+++ b/components/pdf/browser/pdf_web_contents_helper.cc
@@ -0,0 +1,107 @@
+// 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,
+                        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
diff --git a/components/pdf/browser/pdf_web_contents_helper.h b/components/pdf/browser/pdf_web_contents_helper.h
new file mode 100644
index 0000000..d37b57f
--- /dev/null
+++ b/components/pdf/browser/pdf_web_contents_helper.h
@@ -0,0 +1,74 @@
+// 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.
+
+#ifndef COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
+#define COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
+
+#include <string>
+
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+#include "ipc/ipc_message.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace pdf {
+
+class OpenPDFInReaderPromptClient;
+class PDFWebContentsHelperClient;
+
+// Per-WebContents class to handle PDF messages.
+class PDFWebContentsHelper
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<PDFWebContentsHelper> {
+ public:
+  static void CreateForWebContentsWithClient(
+      content::WebContents* contents,
+      scoped_ptr<PDFWebContentsHelperClient> client);
+
+  OpenPDFInReaderPromptClient* open_in_reader_prompt() const {
+    return open_in_reader_prompt_.get();
+  }
+
+  void ShowOpenInReaderPrompt(scoped_ptr<OpenPDFInReaderPromptClient> prompt);
+
+ private:
+  PDFWebContentsHelper(content::WebContents* web_contents,
+                       scoped_ptr<PDFWebContentsHelperClient> client);
+  virtual ~PDFWebContentsHelper();
+
+  // content::WebContentsObserver overrides:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void DidNavigateMainFrame(
+      const content::LoadCommittedDetails& details,
+      const content::FrameNavigateParams& params) OVERRIDE;
+
+  // Internal helpers ----------------------------------------------------------
+
+  void UpdateLocationBar();
+  void OnModalPromptForPasswordClosed(IPC::Message* reply_message,
+                                      bool success,
+                                      const base::string16& actual_value);
+
+  // Message handlers.
+  void OnHasUnsupportedFeature();
+  void OnSaveURLAs(const GURL& url, const content::Referrer& referrer);
+  void OnUpdateContentRestrictions(int content_restrictions);
+  void OnModalPromptForPassword(const std::string& prompt,
+                                IPC::Message* reply_message);
+
+  // The model for the confirmation prompt to open a PDF in Adobe Reader.
+  scoped_ptr<OpenPDFInReaderPromptClient> open_in_reader_prompt_;
+  scoped_ptr<PDFWebContentsHelperClient> client_;
+
+  DISALLOW_COPY_AND_ASSIGN(PDFWebContentsHelper);
+};
+
+}  // namespace pdf
+
+#endif  // COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_H_
diff --git a/components/pdf/browser/pdf_web_contents_helper_client.h b/components/pdf/browser/pdf_web_contents_helper_client.h
new file mode 100644
index 0000000..17dfb4e
--- /dev/null
+++ b/components/pdf/browser/pdf_web_contents_helper_client.h
@@ -0,0 +1,43 @@
+// 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.
+
+#ifndef COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_CLIENT_H_
+#define COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_CLIENT_H_
+
+#include "base/callback.h"
+#include "base/strings/string16.h"
+#include "ipc/ipc_message.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace pdf {
+
+typedef base::Callback<
+    void(bool /* success */, const base::string16& /* password */)>
+    PasswordDialogClosedCallback;
+
+class PDFWebContentsHelperClient {
+ public:
+  virtual ~PDFWebContentsHelperClient() {}
+
+  virtual void UpdateLocationBar(content::WebContents* contents) = 0;
+
+  virtual void UpdateContentRestrictions(content::WebContents* contents,
+                                         int content_restrictions) = 0;
+
+  virtual void OnPDFHasUnsupportedFeature(content::WebContents* contents) = 0;
+
+  virtual void OnSaveURL(content::WebContents* contents) = 0;
+
+  virtual void OnShowPDFPasswordDialog(
+      content::WebContents* contents,
+      const base::string16& prompt,
+      const PasswordDialogClosedCallback& callback) = 0;
+};
+
+}  // namespace pdf
+
+#endif  // COMPONENTS_PDF_BROWSER_PDF_WEB_CONTENTS_HELPER_CLIENT_H_