Move discardable memory to //components from //content

content/child/DEPS

Index: content/child/DEPS
diff --git a/content/child/DEPS b/content/child/DEPS
index 355baddb577f8fa920f8c1088cff43d28e20233d..c122594feb22153f1e96df0e98ec407550baf55c 100644
--- a/content/child/DEPS
+++ b/content/child/DEPS
@@ -1,6 +1,8 @@
 include_rules = [
   # Allow inclusion of specific components that we depend on.
   # See comment in content/DEPS for which components are allowed.
+  "+components/discardable_memory/client",
+  "+components/discardable_memory/common",
   "+components/mime_util",
   "+components/scheduler/child",
   "+components/scheduler/common",
@@ -14,3 +16,9 @@ include_rules = [
   "+services/service_manager",
   "+v8/include/v8.h"
 ]
+
+specific_include_rules = {
+  "child_thread_impl_browsertest\.*": [
+    "+components/discardable_memory/service",
+  ],
+}