skiaserve: Add CORS header, and debugger code is served over HTTPS.

tools/skiaserve/skiaserve.cpp

Index: tools/skiaserve/skiaserve.cpp
diff --git a/tools/skiaserve/skiaserve.cpp b/tools/skiaserve/skiaserve.cpp
index b615d443c8d1126eada0cdcf6704622e3bd65547..e0a17bfe2295d0f6206279c5c0d8480b9120ed72 100644
--- a/tools/skiaserve/skiaserve.cpp
+++ b/tools/skiaserve/skiaserve.cpp
@@ -156,12 +156,13 @@ static int SendJSON(MHD_Connection* connection, SkPicture* picture) {
 
 static int SendTemplate(MHD_Connection* connection, bool redirect = false,
                         const char* redirectUrl = nullptr) {
-    SkString debuggerTemplate = generateTemplate(SkString("http://debugger.skia.org"));
+    SkString debuggerTemplate = generateTemplate(SkString("https://debugger.skia.org"));
 
     MHD_Response* response = MHD_create_response_from_buffer(
         debuggerTemplate.size(),
         (void*) const_cast<char*>(debuggerTemplate.c_str()),
         MHD_RESPMEM_MUST_COPY);
+    MHD_add_response_header (response, "Access-Control-Allow-Origin", "*");
 
     int status = MHD_HTTP_OK;