Moved ambient lights out of SkLight's light array

gm/lightingshader2.cpp

 /*
  * 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 "gm.h"
 #include "SkLightingShader.h"
 #include "SkNormalSource.h"
@@ skipping 29 matching lines @@
     }
 
     void onOnceBeforeDraw() override {
         const SkVector3 kLightFromUpperRight = SkVector3::Make(0.788f, 0.394f, 0.473f);
         const SkVector3 kLightFromUpperLeft = SkVector3::Make(-0.788f, 0.394f, 0.473f);
 
         // Standard set of lights
         SkLights::Builder builder;
         builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 1.0f, 1.0f),
                                                      kLightFromUpperRight));
-        builder.add(SkLights::Light::MakeAmbient(SkColor3f::Make(0.2f, 0.2f, 0.2f)));
+        builder.setAmbientLightColor(SkColor3f::Make(0.2f, 0.2f, 0.2f));
         fLights = builder.finish();
 
         // No directional lights
         SkLights::Builder builderNoDir;
-        builderNoDir.add(SkLights::Light::MakeAmbient(SkColor3f::Make(0.2f, 0.2f, 0.2f)));
+        builderNoDir.setAmbientLightColor(SkColor3f::Make(0.2f, 0.2f, 0.2f));
         fLightsNoDir = builderNoDir.finish();
 
         // Two directional lights
         SkLights::Builder builderTwoDir;
         builderTwoDir.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 0.0f, 1.0f),
                                                            kLightFromUpperRight));
         builderTwoDir.add(SkLights::Light::MakeDirectional(SkColor3f::Make(0.0f, 1.0f, 1.0f),
                                                            kLightFromUpperLeft));
-        builderTwoDir.add(SkLights::Light::MakeAmbient(SkColor3f::Make(0.2f, 0.2f, 0.2f)));
+        builderTwoDir.setAmbientLightColor(SkColor3f::Make(0.2f, 0.2f, 0.2f));
         fLightsTwoDir = builderTwoDir.finish();
 
         fRect = SkRect::MakeIWH(kTexSize, kTexSize);
         SkMatrix matrix;
         SkRect bitmapBounds = SkRect::MakeIWH(kTexSize, kTexSize);
         matrix.setRectToRect(bitmapBounds, fRect, SkMatrix::kFill_ScaleToFit);
 
         SkBitmap opaqueDiffuseMap = sk_tool_utils::create_checkerboard_bitmap(
                 kTexSize, kTexSize,
                 sk_tool_utils::color_to_565(0x0),
@@ skipping 190 matching lines @@
     sk_sp<SkLights> fLightsNoDir;
     sk_sp<SkLights> fLightsTwoDir;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new LightingShader2GM;)
 }