Support jumbo in content/{utility,public,gpu,network}

Jumbo is a unity build system aimed at dramatically reducing
compilation times by merging cc files into larger translation
units.

This change will remove about 6 CPU minutes from the effort to compile
chrome+content_shell+blink_tests on the reference hardware. This is
slightly less than 1% of the total effort in a jumbo build.

Bug: 746953
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_mojo
Change-Id: I19856815c50724004d11a7e5342e84bff802e6f4
Reviewed-on: https://chromium-review.googlesource.com/801013
Commit-Queue: Daniel Bratell <bratell@opera.com>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521317}

content/gpu/BUILD.gn

@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/jumbo.gni")
 import("//build/config/ui.gni")
 import("//gpu/vulkan/features.gni")
 import("//media/media_options.gni")
@@ -23,9 +24,9 @@ group("gpu") {
 }
 
 if (is_component_build) {
-  link_target_type = "source_set"
+  link_target_type = "jumbo_source_set"
 } else {
-  link_target_type = "static_library"
+  link_target_type = "jumbo_static_library"
 }
 
 target(link_target_type, "gpu_sources") {

content/network/BUILD.gn

@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/jumbo.gni")
 import("//services/service_manager/public/service_manifest.gni")
 
 group("network") {
@@ -18,7 +19,7 @@ group("network") {
   }
 }
 
-source_set("network_sources") {
+jumbo_source_set("network_sources") {
   # Depend on via ":network above.
   visibility = [
     ":network",

content/public/browser/BUILD.gn

@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/jumbo.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 
@@ -18,10 +19,9 @@ group("browser") {
   }
 }
 
-source_set("browser_sources") {
+jumbo_source_set("browser_sources") {
   # External code should depend on via ":browser" above.
   visibility = [ "//content/*" ]
-
   sources = [
     "android/android_overlay_provider.h",
     "android/browser_media_player_manager_register.cc",

content/public/child/BUILD.gn

@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/jumbo.gni")
 import("//ppapi/features/features.gni")
 
 # See //content/BUILD.gn for how this works.
@@ -23,7 +24,7 @@ group("child") {
   }
 }
 
-source_set("child_sources") {
+jumbo_source_set("child_sources") {
   # External code should depend in via ":child" above.
   visibility = [ "//content/*" ]
 

content/public/common/BUILD.gn

@@ -5,6 +5,7 @@
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
+import("//build/config/jumbo.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
@@ -102,7 +103,7 @@ source_set("static_features") {
   public_configs = [ ":static_switches_defines" ]
 }
 
-source_set("common_sources") {
+jumbo_source_set("common_sources") {
   # External code should depend on via ":common" above.
   visibility = [ "//content/*" ]
 

content/public/renderer/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
+import("//build/config/jumbo.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
 
@@ -20,9 +21,9 @@ group("renderer") {
 }
 
 if (is_component_build) {
-  link_target_type = "source_set"
+  link_target_type = "jumbo_source_set"
 } else {
-  link_target_type = "static_library"
+  link_target_type = "jumbo_static_library"
 }
 target(link_target_type, "renderer_sources") {
   # External code should depend on via ":renderer" above.

content/utility/BUILD.gn

@@ -2,9 +2,10 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/jumbo.gni")
 import("//media/media_options.gni")
 
-source_set("utility") {
+jumbo_source_set("utility") {
   # Only the public target should depend on this. All other targets (even
   # internal content ones other than test) should depend on the public one.
   visibility = [