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, 102 insertions, 0 deletions

diff --git a/components/pdf/common/BUILD.gn b/components/pdf/common/BUILD.gn
new file mode 100644
index 0000000..adff35e
--- /dev/null
+++ b/components/pdf/common/BUILD.gn
@@ -0,0 +1,20 @@
+# 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("common") {
+  sources = [
+    "pdf_message_generator.cc",
+    "pdf_message_generator.h",
+    "pdf_messages.h",
+  ]
+
+  deps = [
+    "//base",
+    "//content/public/common",
+    "//ipc",
+    "//url",
+  ]
+}
diff --git a/components/pdf/common/OWNERS b/components/pdf/common/OWNERS
new file mode 100644
index 0000000..faa1757
--- /dev/null
+++ b/components/pdf/common/OWNERS
@@ -0,0 +1,11 @@
+# Changes to IPC messages require a security review to avoid introducing
+# new sandbox escapes.
+per-file *_messages*.h=set noparent
+per-file *_messages*.h=cevans@chromium.org
+per-file *_messages*.h=dcheng@chromium.org
+per-file *_messages*.h=inferno@chromium.org
+per-file *_messages*.h=jln@chromium.org
+per-file *_messages*.h=jschuh@chromium.org
+per-file *_messages*.h=kenrb@chromium.org
+per-file *_messages*.h=nasko@chromium.org
+per-file *_messages*.h=tsepez@chromium.org
diff --git a/components/pdf/common/pdf_message_generator.cc b/components/pdf/common/pdf_message_generator.cc
new file mode 100644
index 0000000..025d94c
--- /dev/null
+++ b/components/pdf/common/pdf_message_generator.cc
@@ -0,0 +1,33 @@
+// 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.
+
+// Get basic type definitions.
+#define IPC_MESSAGE_IMPL
+#include "components/pdf/common/pdf_message_generator.h"
+
+// Generate constructors.
+#include "ipc/struct_constructor_macros.h"
+#include "components/pdf/common/pdf_message_generator.h"
+
+// Generate destructors.
+#include "ipc/struct_destructor_macros.h"
+#include "components/pdf/common/pdf_message_generator.h"
+
+// Generate param traits write methods.
+#include "ipc/param_traits_write_macros.h"
+namespace IPC {
+#include "components/pdf/common/pdf_message_generator.h"
+}  // namespace IPC
+
+// Generate param traits read methods.
+#include "ipc/param_traits_read_macros.h"
+namespace IPC {
+#include "components/pdf/common/pdf_message_generator.h"
+}  // namespace IPC
+
+// Generate param traits log methods.
+#include "ipc/param_traits_log_macros.h"
+namespace IPC {
+#include "components/pdf/common/pdf_message_generator.h"
+}  // namespace IPC
diff --git a/components/pdf/common/pdf_message_generator.h b/components/pdf/common/pdf_message_generator.h
new file mode 100644
index 0000000..c55d672
--- /dev/null
+++ b/components/pdf/common/pdf_message_generator.h
@@ -0,0 +1,7 @@
+// 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.
+
+// Multiply-included file, no traditional include guard.
+
+#include "components/pdf/common/pdf_messages.h"
diff --git a/components/pdf/common/pdf_messages.h b/components/pdf/common/pdf_messages.h
new file mode 100644
index 0000000..0973923
--- /dev/null
+++ b/components/pdf/common/pdf_messages.h
@@ -0,0 +1,31 @@
+// 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.
+
+// Multiply-included file, no traditional include guard.
+#include <string.h>
+
+#include "content/public/common/common_param_traits.h"
+#include "content/public/common/common_param_traits_macros.h"
+#include "content/public/common/referrer.h"
+#include "ipc/ipc_message_macros.h"
+#include "url/gurl.h"
+
+#define IPC_MESSAGE_START PDFMsgStart
+
+// Updates the content restrictions, i.e. to disable print/copy.
+IPC_MESSAGE_ROUTED1(PDFHostMsg_PDFUpdateContentRestrictions,
+                    int /* restrictions */)
+
+// The currently displayed PDF has an unsupported feature.
+IPC_MESSAGE_ROUTED0(PDFHostMsg_PDFHasUnsupportedFeature)
+
+// Brings up SaveAs... dialog to save specified URL.
+IPC_MESSAGE_ROUTED2(PDFHostMsg_PDFSaveURLAs,
+                    GURL /* url */,
+                    content::Referrer /* referrer */)
+
+// Brings up a Password... dialog for protected documents.
+IPC_SYNC_MESSAGE_ROUTED1_1(PDFHostMsg_PDFModalPromptForPassword,
+                           std::string /* prompt */,
+                           std::string /* actual_value */)