add print to pdf for headless

headless/BUILD.gn

 # Copyright 2015 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/chrome_build.gni")
 import("//headless/headless.gni")
 import("//build/util/process_version.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
@@ skipping 195 matching lines @@
               "lib/browser/headless_devtools.h",
               "lib/browser/headless_devtools_client_impl.cc",
               "lib/browser/headless_devtools_client_impl.h",
               "lib/browser/headless_devtools_manager_delegate.cc",
               "lib/browser/headless_devtools_manager_delegate.h",
               "lib/browser/headless_macros.h",
               "lib/browser/headless_network_delegate.cc",
               "lib/browser/headless_network_delegate.h",
               "lib/browser/headless_platform_event_source.cc",
               "lib/browser/headless_platform_event_source.h",
+              "lib/browser/headless_print_manager.cc",
+              "lib/browser/headless_print_manager.h",
               "lib/browser/headless_shell_application_mac.mm",
               "lib/browser/headless_shell_application_mac.h",
               "lib/browser/headless_url_request_context_getter.cc",
               "lib/browser/headless_url_request_context_getter.h",
               "lib/browser/headless_web_contents_impl.cc",
               "lib/browser/headless_web_contents_impl.h",
               "lib/headless_crash_reporter_client.cc",
               "lib/headless_crash_reporter_client.h",
               "lib/headless_content_client.cc",
               "lib/headless_content_client.h",
               "lib/headless_content_main_delegate.cc",
               "lib/headless_content_main_delegate.h",
+              "lib/renderer/headless_content_renderer_client.cc",
+              "lib/renderer/headless_content_renderer_client.h",
+              "lib/renderer/headless_print_web_view_helper_delegate.cc",
+              "lib/renderer/headless_print_web_view_helper_delegate.h",
               "public/headless_browser.cc",
               "public/headless_browser.h",
               "public/headless_browser_context.h",
               "public/headless_devtools_client.h",
               "public/headless_devtools_host.h",
               "public/headless_devtools_target.h",
               "public/headless_export.h",
               "public/headless_web_contents.h",
               "public/internal/message_dispatcher.h",
               "public/internal/value_conversions.h",
@@ skipping 45 matching lines @@
       "lib/browser/headless_window_tree_host.cc",
       "lib/browser/headless_window_tree_host.h",
     ]
   }
 
   deps = [
     ":gen_devtools_client_api",
     ":version_header",
     "//base",
     "//components/crash/content/browser",
+    "//components/printing/browser",

[Lei Zhang, 2017/03/29 01:38:03]

Is headless multi-process? Do you intend to separate browser from renderer? If
yes, the team should discuss where to do that separation. Right now this makes
it look like everything goes in 1 big build target.

[jzfeng, 2017/03/29 03:50:12]

As I remember, we discussed this issue a bit and agreed on putting them
together. Add eseckler@ to explain more on this issue.

[Lei Zhang, 2017/03/29 05:30:15]

So is headless multi-process? If the answer is no, then this makes a bit more
sense. If there's a discussion thread somewhere, I can take a look.

[Eric Seckler, 2017/03/29 11:21:19]

Headless is multi-process, but so far, we are linking browser+renderer together
in one target, since we didn't have (m)any renderer deps. (Our build setup
follows that of content_shell, which also links renderer+browser together into a
single lib for simplicity.)

While it'd be nice to separate things into two targets as we're growing, I don't
think we need to do this now. jzfeng, feel free to look into this though if you
feel adventurous :)

[jzfeng, 2017/03/30 03:04:56]

OK. I can look into it a bit. If it is easy to do, I can add it into this patch.
Otherwise, I prefer doing in a separate patch.

[jzfeng, 2017/03/30 03:20:13]

Add David, who knows more about headless on mac and windows. Looks like on
windows, we need to separate them to make it compile.

+    "//components/printing/renderer",
     "//components/security_state/content",
     "//components/security_state/core",
     "//content/public/app:both",
     "//content/public/browser",
     "//content/public/child:child",
     "//content/public/common",
     "//content/public/common:service_names",
     "//net",
     "//services/service_manager/public/cpp",
     "//third_party/mesa:osmesa",
@@ skipping 179 matching lines @@
 
 executable("headless_example") {
   sources = [
     "app/headless_example.cc",
   ]
 
   deps = [
     "//headless:headless_shell_lib",
   ]
 }