Add ShaderBuilders to EmitArgs and remove gettings from ProgBuilder.

src/effects/SkAlphaThresholdFilter.cpp

Index: src/effects/SkAlphaThresholdFilter.cpp
diff --git a/src/effects/SkAlphaThresholdFilter.cpp b/src/effects/SkAlphaThresholdFilter.cpp
index ff5e93e0362a04dde266b29bdc79c82ceb525829..e6f1f088cbae9f1ca8775643ade00ad1f9bacaa6 100644
--- a/src/effects/SkAlphaThresholdFilter.cpp
+++ b/src/effects/SkAlphaThresholdFilter.cpp
@@ -146,40 +146,40 @@ void GrGLAlphaThresholdEffect::emitCode(EmitArgs& args) {
                                                    kFloat_GrSLType, kDefault_GrSLPrecision,
                                                    "outer_threshold");
 
-    GrGLSLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
-    SkString coords2D = fsBuilder->ensureFSCoords2D(args.fCoords, 0);
-    SkString maskCoords2D = fsBuilder->ensureFSCoords2D(args.fCoords, 1);
-
-    fsBuilder->codeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str());
-    fsBuilder->codeAppendf("\t\tvec2 mask_coord = %s;\n", maskCoords2D.c_str());
-    fsBuilder->codeAppend("\t\tvec4 input_color = ");
-    fsBuilder->appendTextureLookup(args.fSamplers[0], "coord");
-    fsBuilder->codeAppend(";\n");
-    fsBuilder->codeAppend("\t\tvec4 mask_color = ");
-    fsBuilder->appendTextureLookup(args.fSamplers[1], "mask_coord");
-    fsBuilder->codeAppend(";\n");
-
-    fsBuilder->codeAppendf("\t\tfloat inner_thresh = %s;\n",
-                           args.fBuilder->getUniformCStr(fInnerThresholdVar));
-    fsBuilder->codeAppendf("\t\tfloat outer_thresh = %s;\n",
-                           args.fBuilder->getUniformCStr(fOuterThresholdVar));
-    fsBuilder->codeAppend("\t\tfloat mask = mask_color.a;\n");
-
-    fsBuilder->codeAppend("vec4 color = input_color;\n");
-    fsBuilder->codeAppend("\t\tif (mask < 0.5) {\n"
-                          "\t\t\tif (color.a > outer_thresh) {\n"
-                          "\t\t\t\tfloat scale = outer_thresh / color.a;\n"
-                          "\t\t\t\tcolor.rgb *= scale;\n"
-                          "\t\t\t\tcolor.a = outer_thresh;\n"
-                          "\t\t\t}\n"
-                          "\t\t} else if (color.a < inner_thresh) {\n"
-                          "\t\t\tfloat scale = inner_thresh / max(0.001, color.a);\n"
-                          "\t\t\tcolor.rgb *= scale;\n"
-                          "\t\t\tcolor.a = inner_thresh;\n"
-                          "\t\t}\n");
-
-    fsBuilder->codeAppendf("%s = %s;\n", args.fOutputColor,
-                           (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr4("color")).c_str());
+    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    SkString coords2D = fragBuilder->ensureFSCoords2D(args.fCoords, 0);
+    SkString maskCoords2D = fragBuilder->ensureFSCoords2D(args.fCoords, 1);
+
+    fragBuilder->codeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str());
+    fragBuilder->codeAppendf("\t\tvec2 mask_coord = %s;\n", maskCoords2D.c_str());
+    fragBuilder->codeAppend("\t\tvec4 input_color = ");
+    fragBuilder->appendTextureLookup(args.fSamplers[0], "coord");
+    fragBuilder->codeAppend(";\n");
+    fragBuilder->codeAppend("\t\tvec4 mask_color = ");
+    fragBuilder->appendTextureLookup(args.fSamplers[1], "mask_coord");
+    fragBuilder->codeAppend(";\n");
+
+    fragBuilder->codeAppendf("\t\tfloat inner_thresh = %s;\n",
+                             args.fBuilder->getUniformCStr(fInnerThresholdVar));
+    fragBuilder->codeAppendf("\t\tfloat outer_thresh = %s;\n",
+                             args.fBuilder->getUniformCStr(fOuterThresholdVar));
+    fragBuilder->codeAppend("\t\tfloat mask = mask_color.a;\n");
+
+    fragBuilder->codeAppend("vec4 color = input_color;\n");
+    fragBuilder->codeAppend("\t\tif (mask < 0.5) {\n"
+                            "\t\t\tif (color.a > outer_thresh) {\n"
+                            "\t\t\t\tfloat scale = outer_thresh / color.a;\n"
+                            "\t\t\t\tcolor.rgb *= scale;\n"
+                            "\t\t\t\tcolor.a = outer_thresh;\n"
+                            "\t\t\t}\n"
+                            "\t\t} else if (color.a < inner_thresh) {\n"
+                            "\t\t\tfloat scale = inner_thresh / max(0.001, color.a);\n"
+                            "\t\t\tcolor.rgb *= scale;\n"
+                            "\t\t\tcolor.a = inner_thresh;\n"
+                            "\t\t}\n");
+
+    fragBuilder->codeAppendf("%s = %s;\n", args.fOutputColor,
+                             (GrGLSLExpr4(args.fInputColor) * GrGLSLExpr4("color")).c_str());
 }
 
 void GrGLAlphaThresholdEffect::onSetData(const GrGLSLProgramDataManager& pdman,