Snapshot of all changes to get jumbo in blink and content.

content/child/BUILD.gn

Index: content/child/BUILD.gn
diff --git a/content/child/BUILD.gn b/content/child/BUILD.gn
index 62cedc17b9b76394c0179033398ebd263adddd97..af763de2f88fcd774c89e40adc13db025af0c179 100644
--- a/content/child/BUILD.gn
+++ b/content/child/BUILD.gn
@@ -6,13 +6,9 @@ import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//ppapi/features/features.gni")
 import("//third_party/WebKit/public/public_features.gni")
+import("//content/content.gni")
 
-if (is_component_build) {
-  link_target_type = "source_set"
-} else {
-  link_target_type = "static_library"
-}
-target(link_target_type, "child") {
+content_component("child") {
   # Targets external to content should always link to the public API.
   # Internal targets can link to this but only if they're child processes
   # (i.e. not content/browser or content/common) and only if they're inside the