Added the framework for having canvas/recorder/picture record depth_set's.

src/core/SkLightingShader.cpp

Index: src/core/SkLightingShader.cpp
diff --git a/src/core/SkLightingShader.cpp b/src/core/SkLightingShader.cpp
index 473028105a9c5a295b90dd438a43a3c6be0af353..6b9a39f4fb537a030ec7bfa5195042ffac66c470 100644
--- a/src/core/SkLightingShader.cpp
+++ b/src/core/SkLightingShader.cpp
@@ -176,6 +176,7 @@ public:
             this->emitChild(0, nullptr, &dstNormalName, args);
 
             fragBuilder->codeAppendf("vec3 normal = %s.xyz;", dstNormalName.c_str());
+

[jvanverth1, 2016/07/07 19:08:35]

Nit: if you remove this line, then this file doesn't need to be patched.

[vjiaoblack, 2016/07/07 19:17:56]

Done.

             fragBuilder->codeAppendf("float NdotL = clamp(dot(normal, %s), 0.0, 1.0);",
                                      lightDirUniName);
             // diffuse light