Componentization: make symbols visible.

public/platform/modules/navigator_services/WebServicePortProviderClient.h

Index: public/platform/modules/navigator_services/WebServicePortProviderClient.h
diff --git a/public/platform/modules/navigator_services/WebServicePortProviderClient.h b/public/platform/modules/navigator_services/WebServicePortProviderClient.h
index d1d1a58b04b8a99b51561094caac678dd6724e94..b4e33163029c295fc9192aba5a3c0ced317b46f2 100644
--- a/public/platform/modules/navigator_services/WebServicePortProviderClient.h
+++ b/public/platform/modules/navigator_services/WebServicePortProviderClient.h
@@ -6,13 +6,17 @@
 #define WebServicePortProviderClient_h
 
 #include "public/platform/WebCommon.h"
+#include "public/platform/WebMessagePortChannel.h"
+#include "public/platform/modules/navigator_services/WebServicePort.h"
 
 namespace blink {
 
+class WebString;
+
 // Interface implemented by blink, used for communication back from embedding
 // code to blink. An instance of this interface is passed to the embedder when
 // a WebServicePortProvider is created.
-class WebServicePortProviderClient {
+class BLINK_PLATFORM_EXPORT WebServicePortProviderClient {
 public:
     // Post a message to one of the ports owned by a ServicePortCollection.
     virtual void postMessage(WebServicePortID, const WebString&, const WebMessagePortChannelArray&) = 0;