Script streaming: Add more Finch experiments for streaming policies.

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index f09be50cc455cfccd7b1edc9764228c44469c2f2..24b49e0a107afb8112cbf0d4f8e7308ac74a29ae 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -473,9 +473,22 @@ WebPreferences RenderViewHostImpl::ComputeWebkitPrefs(const GURL& url) {
     }
   }
 
+  std::string streaming_experiment_group =
+      base::FieldTrialList::FindFullName("V8ScriptStreaming");
   prefs.v8_script_streaming_enabled =
-      command_line.HasSwitch(switches::kEnableV8ScriptStreaming) ||
-      base::FieldTrialList::FindFullName("V8ScriptStreaming") == "Enabled";
+      command_line.HasSwitch(switches::kEnableV8ScriptStreaming);
+  if (streaming_experiment_group == "Enabled") {
+    prefs.v8_script_streaming_enabled = true;
+    prefs.v8_script_streaming_mode = V8_SCRIPT_STREAMING_MODE_ALL;
+  } else if (streaming_experiment_group == "OnlyAsyncAndDefer") {
+    prefs.v8_script_streaming_enabled = true;
+    prefs.v8_script_streaming_mode =
+        V8_SCRIPT_STREAMING_MODE_ONLY_ASYNC_AND_DEFER;
+  } else if (streaming_experiment_group == "AllPlusBlockParserBlocking") {
+    prefs.v8_script_streaming_enabled = true;
+    prefs.v8_script_streaming_mode =
+        V8_SCRIPT_STREAMING_MODE_ALL_PLUS_BLOCK_PARSER_BLOCKING;
+  }
 
   GetContentClient()->browser()->OverrideWebkitPrefs(this, url, &prefs);
   return prefs;