Add ShaderBuilders to EmitArgs and remove gettings from ProgBuilder.

src/effects/SkMagnifierImageFilter.cpp

Index: src/effects/SkMagnifierImageFilter.cpp
diff --git a/src/effects/SkMagnifierImageFilter.cpp b/src/effects/SkMagnifierImageFilter.cpp
index 61118f502cad3a2258ec728344ef11c570150114..911294444abadd37c11a36e512ea2b1d366410a6 100644
--- a/src/effects/SkMagnifierImageFilter.cpp
+++ b/src/effects/SkMagnifierImageFilter.cpp
@@ -133,39 +133,39 @@ void GrGLMagnifierEffect::emitCode(EmitArgs& args) {
         GrGLSLProgramBuilder::kFragment_Visibility,
         kVec4f_GrSLType, kDefault_GrSLPrecision, "Bounds");
 
-    GrGLSLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
-    SkString coords2D = fsBuilder->ensureFSCoords2D(args.fCoords, 0);
-    fsBuilder->codeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str());
-    fsBuilder->codeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n",
-                           args.fBuilder->getUniformCStr(fOffsetVar),
-                           coords2D.c_str(),
-                           args.fBuilder->getUniformCStr(fInvZoomVar));
+    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    SkString coords2D = fragBuilder->ensureFSCoords2D(args.fCoords, 0);
+    fragBuilder->codeAppendf("\t\tvec2 coord = %s;\n", coords2D.c_str());
+    fragBuilder->codeAppendf("\t\tvec2 zoom_coord = %s + %s * %s;\n",
+                             args.fBuilder->getUniformCStr(fOffsetVar),
+                             coords2D.c_str(),
+                             args.fBuilder->getUniformCStr(fInvZoomVar));
     const char* bounds = args.fBuilder->getUniformCStr(fBoundsVar);
-    fsBuilder->codeAppendf("\t\tvec2 delta = (coord - %s.xy) * %s.zw;\n", bounds, bounds);
-    fsBuilder->codeAppendf("\t\tdelta = min(delta, vec2(1.0, 1.0) - delta);\n");
-    fsBuilder->codeAppendf("\t\tdelta = delta * %s;\n",
-                           args.fBuilder->getUniformCStr(fInvInsetVar));
-
-    fsBuilder->codeAppend("\t\tfloat weight = 0.0;\n");
-    fsBuilder->codeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n");
-    fsBuilder->codeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n");
-    fsBuilder->codeAppend("\t\t\tfloat dist = length(delta);\n");
-    fsBuilder->codeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n");
-    fsBuilder->codeAppend("\t\t\tweight = min(dist * dist, 1.0);\n");
-    fsBuilder->codeAppend("\t\t} else {\n");
-    fsBuilder->codeAppend("\t\t\tvec2 delta_squared = delta * delta;\n");
-    fsBuilder->codeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared.y), 1.0);\n");
-    fsBuilder->codeAppend("\t\t}\n");
-
-    fsBuilder->codeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\n");
-    fsBuilder->codeAppend("\t\tvec4 output_color = ");
-    fsBuilder->appendTextureLookup(args.fSamplers[0], "mix_coord");
-    fsBuilder->codeAppend(";\n");
-
-    fsBuilder->codeAppendf("\t\t%s = output_color;", args.fOutputColor);
+    fragBuilder->codeAppendf("\t\tvec2 delta = (coord - %s.xy) * %s.zw;\n", bounds, bounds);
+    fragBuilder->codeAppendf("\t\tdelta = min(delta, vec2(1.0, 1.0) - delta);\n");
+    fragBuilder->codeAppendf("\t\tdelta = delta * %s;\n",
+                             args.fBuilder->getUniformCStr(fInvInsetVar));
+
+    fragBuilder->codeAppend("\t\tfloat weight = 0.0;\n");
+    fragBuilder->codeAppend("\t\tif (delta.s < 2.0 && delta.t < 2.0) {\n");
+    fragBuilder->codeAppend("\t\t\tdelta = vec2(2.0, 2.0) - delta;\n");
+    fragBuilder->codeAppend("\t\t\tfloat dist = length(delta);\n");
+    fragBuilder->codeAppend("\t\t\tdist = max(2.0 - dist, 0.0);\n");
+    fragBuilder->codeAppend("\t\t\tweight = min(dist * dist, 1.0);\n");
+    fragBuilder->codeAppend("\t\t} else {\n");
+    fragBuilder->codeAppend("\t\t\tvec2 delta_squared = delta * delta;\n");
+    fragBuilder->codeAppend("\t\t\tweight = min(min(delta_squared.x, delta_squared.y), 1.0);\n");
+    fragBuilder->codeAppend("\t\t}\n");
+
+    fragBuilder->codeAppend("\t\tvec2 mix_coord = mix(coord, zoom_coord, weight);\n");
+    fragBuilder->codeAppend("\t\tvec4 output_color = ");
+    fragBuilder->appendTextureLookup(args.fSamplers[0], "mix_coord");
+    fragBuilder->codeAppend(";\n");
+
+    fragBuilder->codeAppendf("\t\t%s = output_color;", args.fOutputColor);
     SkString modulate;
     GrGLSLMulVarBy4f(&modulate, args.fOutputColor, args.fInputColor);
-    fsBuilder->codeAppend(modulate.c_str());
+    fragBuilder->codeAppend(modulate.c_str());
 }
 
 void GrGLMagnifierEffect::onSetData(const GrGLSLProgramDataManager& pdman,