add customized printing setting for headless

headless/BUILD.gn

Index: headless/BUILD.gn
diff --git a/headless/BUILD.gn b/headless/BUILD.gn
index 7ac3268ceaf24c0486ae0bc8e42c299d2a66c750..d221c57f111adac2fa6849385822ab162ff4d553 100644
--- a/headless/BUILD.gn
+++ b/headless/BUILD.gn
@@ -29,6 +29,7 @@ repack("pak") {
   sources = [
     "$root_gen_dir/blink/public/resources/blink_image_resources_100_percent.pak",
     "$root_gen_dir/blink/public/resources/blink_resources.pak",
+    "$root_gen_dir/components/components_resources.pak",
     "$root_gen_dir/components/strings/components_strings_en-US.pak",
     "$root_gen_dir/content/app/resources/content_resources_100_percent.pak",
     "$root_gen_dir/content/app/strings/content_strings_en-US.pak",
@@ -51,6 +52,7 @@ repack("pak") {
 
   deps = [
     ":resources",
+    "//components/resources:components_resources",
     "//components/strings",
     "//content:resources",
     "//content/app/resources",
@@ -394,6 +396,10 @@ test("headless_unittests") {
     "public/util/testing/fake_managed_dispatch_url_request_job.h",
   ]
 
+  if (enable_basic_printing) {
+    sources += [ "lib/browser/headless_printing_unittest.cc" ]
+  }
+
   deps = [
     ":headless_lib",
     "//base/test:run_all_unittests",
@@ -401,6 +407,10 @@ test("headless_unittests") {
     "//testing/gmock",
     "//testing/gtest",
   ]
+
+  if (enable_basic_printing) {
+    deps += [ "//content/public/common" ]

[Lei Zhang, 2017/05/04 07:29:37]

Not obvious why headless_printing_unittest.cc needs this. Can you explain, or
remove if it is not needed?

[jzfeng, 2017/05/05 02:41:33]

There will compile error if it is removed.

In file included from
../../headless/lib/browser/headless_printing_unittest.cc:7:
In file included from
../../headless/lib/browser/headless_devtools_manager_delegate.h:19:
In file included from ../../headless/lib/browser/headless_print_manager.h:12:
In file included from ../../components/printing/browser/print_manager.h:10:
In file included from ../../content/public/browser/web_contents_observer.h:22:
In file included from ../../third_party/skia/include/core/SkColor.h:11:
In file included from ../../third_party/skia/include/core/SkScalar.h:11:
../../third_party/skia/include/core/../private/SkFloatingPoint.h:13:10: fatal
error: 'SkTypes.h' file not found
#include "SkTypes.h"
         ^~~~~~~~~~~
1 error generated.

[Lei Zhang, 2017/05/05 03:53:00]

I'm skeptical about this as the correct solution, but I don't have better advice
at the moment. Let me look at the dependencies.

+  }
 }
 
 mojom("embedder_mojo_for_testing") {
@@ -496,6 +506,10 @@ test("headless_browsertests") {
     "//testing/gmock",
     "//testing/gtest",
   ]
+
+  if (enable_basic_printing) {
+    deps += [ "//pdf" ]
+  }
 }
 
 static_library("headless_shell_lib") {