Declarative resource hints go through mojo IPC to //content

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index 75eb0319463b12b0bdfe797063fcacc50879e0d5..729f2a66977d14af41ef453cbefe2ab30aea6b6e 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -31,6 +31,8 @@
 #ifndef Platform_h
 #define Platform_h
 
+#include <memory>
+
 #ifdef WIN32
 #include <windows.h>
 #endif
@@ -64,6 +66,7 @@ template<class T> class Local;
 
 namespace blink {
 
+class PlatformMojoInterface;
 class ServiceRegistry;
 class WebAudioBus;
 class WebBlobRegistry;
@@ -526,6 +529,13 @@ public:
 
     virtual ServiceRegistry* serviceRegistry();
 
+    // Resource hints IPC / Mojo ------------------------------------------
+    // TODO(csharrison): Move CrossOriginAttributeValue to public/platform and
+    // take that as an argument instead of credentialsFlag.
+    virtual void preconnect(const KURL&, bool credentialsFlag, int numConnections);
+    virtual void preresolve(const KURL&);
+    virtual void speculativePreresolve(const KURL&);

[kinuko, 2016/06/16 05:39:59]

Do we need to expose these here?

[Charlie Harrison, 2016/06/16 11:00:20]

No, I did it here to make mocking easy for unit tests. I'll revisit this
decision by only exposing the mojo interface.

+
     // Platform events -----------------------------------------------------
     // Device Orientation, Device Motion, Device Light, Battery, Gamepad.
 
@@ -604,9 +614,10 @@ public:
 
 protected:
     Platform();
-    virtual ~Platform() { }
+    virtual ~Platform();
 
     WebThread* m_mainThread;
+    std::unique_ptr<PlatformMojoInterface> m_mojoInterface;

[kinuko, 2016/06/16 05:39:59]

m_mojoInterface's' or m_mojoServices

[Charlie Harrison, 2016/06/16 11:00:20]

m_mojoServices SGTM.

 };
 
 } // namespace blink