predictors: Store protobufs in the database.

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 41b4875cbb61013d7c129ada4580d9a63a50946d..bd9e131c740e3f01a28efca69bda239bcc7cef4e 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -312,6 +312,7 @@ split_static_library("browser") {
     }
 
     deps += [
+      ":resource_prefetch_predictor_proto",
       "//cc",
       "//chrome/app/theme:theme_resources",
       "//chrome/browser/devtools",
@@ -988,6 +989,14 @@ if (is_win) {
   }
 }
 
+if (!is_ios) {
+  proto_library("resource_prefetch_predictor_proto") {
+    sources = [
+      "predictors/resource_prefetch_predictor.proto",
+    ]
+  }
+}
+
 # GYP version: chrome/chrome_resources.gyp:chrome_resources
 # (generate_browser_resources action)
 grit("resources") {