Allow dumping raw json fetched from the server.

chrome/browser/ui/webui/snippets_internals_message_handler.cc

Index: chrome/browser/ui/webui/snippets_internals_message_handler.cc
diff --git a/chrome/browser/ui/webui/snippets_internals_message_handler.cc b/chrome/browser/ui/webui/snippets_internals_message_handler.cc
index e7a7d233aa0a78c3a02fd25c7016b23abb2106f1..a5914d106591c261c0e56f58c819ffcde2a47a6d 100644
--- a/chrome/browser/ui/webui/snippets_internals_message_handler.cc
+++ b/chrome/browser/ui/webui/snippets_internals_message_handler.cc
@@ -59,6 +59,7 @@ std::unique_ptr<base::DictionaryValue> PrepareSnippet(
 SnippetsInternalsMessageHandler::SnippetsInternalsMessageHandler()
     : observer_(this),
       dom_loaded_(false),
+      dump_current_fetch_(false),
       ntp_snippets_service_(nullptr) {}
 
 SnippetsInternalsMessageHandler::~SnippetsInternalsMessageHandler() {}
@@ -70,6 +71,11 @@ void SnippetsInternalsMessageHandler::NTPSnippetsServiceLoaded() {
 
   SendSnippets();
   SendDiscardedSnippets();
+
+  if (dump_current_fetch_) {

[Bernhard Bauer, 2016/04/29 12:02:22]

If we have the last downloaded JSON anyway, we could always send it to the UI
(maybe in an expandable view) instead of having to do this during a refresh. I
would also consider downloading it as a file to be an additional feature (I
personally wouldn't see that much use for it, but maybe someone else would).

[jkrcal, 2016/04/29 13:11:48]

Done, with an extra download button.
Did not format the json in any way, hope it is enough this way.

+    SendJson(ntp_snippets_service_->last_json());
+    dump_current_fetch_ = false;
+  }
 }
 
 void SnippetsInternalsMessageHandler::RegisterMessages() {
@@ -125,8 +131,7 @@ void SnippetsInternalsMessageHandler::HandleDump(const base::ListValue* args) {
   base::JSONWriter::Write(
       *pref_service->GetList(ntp_snippets::prefs::kSnippets), &json);
 
-  web_ui()->CallJavascriptFunction("chrome.SnippetsInternals.receiveJson",
-                                   base::StringValue(json));
+  SendJson(json);
 }
 
 void SnippetsInternalsMessageHandler::HandleClearDiscarded(
@@ -139,12 +144,13 @@ void SnippetsInternalsMessageHandler::HandleClearDiscarded(
 
 void SnippetsInternalsMessageHandler::HandleDownload(
     const base::ListValue* args) {
-  DCHECK_EQ(1u, args->GetSize());
+  DCHECK_EQ(2u, args->GetSize());
 
   SendString("hosts-status", std::string());
 
   std::string hosts_string;
   args->GetString(0, &hosts_string);
+  args->GetBoolean(1, &dump_current_fetch_);
 
   std::vector<std::string> hosts_vector = base::SplitString(
       hosts_string, " ", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
@@ -218,6 +224,11 @@ void SnippetsInternalsMessageHandler::SendHosts() {
                                    result);
 }
 
+void SnippetsInternalsMessageHandler::SendJson(const std::string& json) {
+  web_ui()->CallJavascriptFunction("chrome.SnippetsInternals.receiveJson",
+                                   base::StringValue(json));
+}
+
 void SnippetsInternalsMessageHandler::SendBoolean(const std::string& name,
                                                   bool value) {
   SendString(name, value ? "True" : "False");