Remove unused WebMIMERegistry

sky/viewer/platform/platform_impl.h

Index: sky/viewer/platform/platform_impl.h
diff --git a/sky/viewer/platform/platform_impl.h b/sky/viewer/platform/platform_impl.h
index 78895b18d68df288a1e43117e7f7f1207bb672ca..eaa548546c4a1dd70321cad5228579302d2b9b26 100644
--- a/sky/viewer/platform/platform_impl.h
+++ b/sky/viewer/platform/platform_impl.h
@@ -12,7 +12,6 @@
 #include "mojo/services/public/interfaces/network/network_service.mojom.h"
 #include "sky/engine/public/platform/Platform.h"
 #include "sky/viewer/cc/web_compositor_support_impl.h"
-#include "sky/viewer/platform/webmimeregistry_impl.h"
 #include "sky/viewer/platform/webthemeengine_impl.h"
 
 namespace mojo {
@@ -27,7 +26,6 @@ class PlatformImpl : public blink::Platform {
   virtual ~PlatformImpl();
 
   // blink::Platform methods:
-  virtual blink::WebMimeRegistry* mimeRegistry();
   virtual blink::WebThemeEngine* themeEngine();
   virtual blink::WebString defaultLocale();
   virtual double currentTime();
@@ -91,7 +89,6 @@ class PlatformImpl : public blink::Platform {
   int shared_timer_suspended_;  // counter
   sky_viewer_cc::WebCompositorSupportImpl compositor_support_;
   WebThemeEngineImpl theme_engine_;
-  WebMimeRegistryImpl mime_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformImpl);
 };