[WIP] Speculatively launch Service Workers on mouse/touch events.

chrome/browser/renderer_host/chrome_render_message_filter.h

Index: chrome/browser/renderer_host/chrome_render_message_filter.h
diff --git a/chrome/browser/renderer_host/chrome_render_message_filter.h b/chrome/browser/renderer_host/chrome_render_message_filter.h
index 97bf627c4d9b248fab3f43afc9b43c69db0b858a..2ed27b0ca720b5e24753a1e191d6b7da7d4a3fa3 100644
--- a/chrome/browser/renderer_host/chrome_render_message_filter.h
+++ b/chrome/browser/renderer_host/chrome_render_message_filter.h
@@ -16,10 +16,18 @@
 class GURL;
 class Profile;
 
+namespace blink {
+enum class WebNavigationHintType;
+}
+
 namespace chrome_browser_net {
 class Predictor;
 }
 
+namespace content {
+class ServiceWorkerContext;
+}
+
 namespace content_settings {
 class CookieSettings;
 }
@@ -36,7 +44,10 @@ class InfoMap;
 // process on the IPC thread.
 class ChromeRenderMessageFilter : public content::BrowserMessageFilter {
  public:
-  ChromeRenderMessageFilter(int render_process_id, Profile* profile);
+  ChromeRenderMessageFilter(
+      int render_process_id,
+      Profile* profile,
+      content::ServiceWorkerContext* service_worker_context);
 
   // content::BrowserMessageFilter methods:
   bool OnMessageReceived(const IPC::Message& message) override;
@@ -51,6 +62,7 @@ class ChromeRenderMessageFilter : public content::BrowserMessageFilter {
 
   void OnDnsPrefetch(const network_hints::LookupRequest& request);
   void OnPreconnect(const GURL& url, bool allow_credentials, int count);
+  void OnNavigationHint(const GURL& url, blink::WebNavigationHintType type);
   void OnUpdatedCacheStats(uint64_t min_capacity,
                            uint64_t max_capacity,
                            uint64_t capacity,
@@ -132,6 +144,9 @@ class ChromeRenderMessageFilter : public content::BrowserMessageFilter {
   // Used to look up permissions at database creation time.
   scoped_refptr<content_settings::CookieSettings> cookie_settings_;
 
+  // Used to start Service Workers for navigation hints.
+  content::ServiceWorkerContext* service_worker_context_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderMessageFilter);
 };