Use runtime_deps to tell create_installer_archive what dlls to copy.

chrome/installer/mini_installer/BUILD.gn

Index: chrome/installer/mini_installer/BUILD.gn
diff --git a/chrome/installer/mini_installer/BUILD.gn b/chrome/installer/mini_installer/BUILD.gn
index a3dcae8d208547f31acbdf06f3d657c57dae44a0..38820d2ffbae26bfe0b8566aa54afe45528f0488 100644
--- a/chrome/installer/mini_installer/BUILD.gn
+++ b/chrome/installer/mini_installer/BUILD.gn
@@ -68,6 +68,25 @@ source_set("unit_tests") {
 
 packed_files_rc_file = "$target_gen_dir/packed_files.rc"
 
+# The runtime deps are used to tell create_installer_archive what component
+# DLLs need to be packaged in a component build.
+setup_runtime_deps = "$root_gen_dir/setup.runtime_deps"
+chrome_runtime_deps = "$root_gen_dir/chrome_component.runtime_deps"

[gab, 2016/06/22 14:04:20]

nit: flip order here so they are declared in same order as their matching group
below

+
+group("chrome_runtime_deps") {
+  write_runtime_deps = chrome_runtime_deps
+  data_deps = [
+    "//chrome",
+  ]
+}
+
+group("setup_runtime_deps") {
+  write_runtime_deps = setup_runtime_deps
+  data_deps = [
+    "//chrome/installer/setup",
+  ]
+}
+
 action("archive") {
   script = "//chrome/tools/build/win/create_installer_archive.py"
 
@@ -98,6 +117,10 @@ action("archive") {
     rebase_path(packed_files_rc_file, root_build_dir),
     "--target_arch=$current_cpu",
     "--distribution=_google_chrome",
+    "--component_runtime_deps",

[gab, 2016/06/22 14:04:20]

Actually since this param is passed even in non-component builds (just happens
to be ignored), how about --chrome_runtime_deps? Also matches better with the
variable used for it.

(same for variables inside the script)

+    rebase_path(chrome_runtime_deps, root_build_dir),
+    "--setup_runtime_deps",
+    rebase_path(setup_runtime_deps, root_build_dir),
 
     # Optional arguments to generate diff installer.
     #'--last_chrome_installer=C:/Temp/base',
@@ -109,6 +132,8 @@ action("archive") {
   ]
 
   deps = [
+    ":chrome_runtime_deps",
+    ":setup_runtime_deps",
     "//chrome",
     "//chrome:main_dll",
     "//chrome/browser/extensions/default_extensions",