Adding support for playback to L32/S32/F16 canvas.

tools/skiaserve/urlhandlers/UrlHandler.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColor.h"
 
 struct MHD_Connection;
@@ skipping 110 matching lines @@
                const char* upload_data, size_t* upload_data_size) override;
 };
 
 class RootHandler : public UrlHandler {
 public:
     bool canHandle(const char* method, const char* url) override;
     int handle(Request* request, MHD_Connection* connection,
                const char* url, const char* method,
                const char* upload_data, size_t* upload_data_size) override;
 };
+
+/**
+ * Controls how rendering is performed (L32, S32, F16).
+ * Posting to /colorMode/0 turns on L32, /colorMode/1 turns on sRGB,
+ * /colorMode/2 turns on FP16.
+ */
+class ColorModeHandler : public UrlHandler {
+public:
+    bool canHandle(const char* method, const char* url) override;
+    int handle(Request* request, MHD_Connection* connection,
+               const char* url, const char* method,
+               const char* upload_data, size_t* upload_data_size) override;
+};