bluetooth: Initial WebBluetooth & WebBluetoothError.

public/platform/Platform.h

Index: public/platform/Platform.h
diff --git a/public/platform/Platform.h b/public/platform/Platform.h
index 56f9b2aa6bc698ff35319b6576a3609d5bb51f18..b5503f1105d7c84454009cd5bd13b0f8b121fb71 100644
--- a/public/platform/Platform.h
+++ b/public/platform/Platform.h
@@ -61,6 +61,7 @@ namespace blink {
 
 class WebAudioBus;
 class WebBlobRegistry;
+class WebBluetooth;
 class WebContentDecryptionModule;
 class WebClipboard;
 class WebCompositorSupport;
@@ -638,6 +639,11 @@ public:
 
     virtual WebGeofencingProvider* geofencingProvider() { return 0; }
 
+    // Bluetooth ----------------------------------------------------------
+
+    // Returns pointer to client owned WebBluetooth implementation.
+    virtual WebBluetooth* bluetooth() { return 0; }
+
 protected:
     virtual ~Platform() { }
 };