Merge fix for 552999 to m47(Always use high precision on NDS transform)

src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp

Index: src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp b/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp
index fc92da713af214e481f359d5ae28d8f8b0fd3cf5..a79ca5a108a96387732715fa9a292a4a9a1701f3 100644
--- a/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLVertexShaderBuilder.cpp
@@ -38,15 +38,10 @@ void GrGLVertexBuilder::emitAttributes(const GrGeometryProcessor& gp) {
 void GrGLVertexBuilder::transformToNormalizedDeviceSpace(const GrShaderVar& posVar) {
     SkASSERT(!fRtAdjustName);
 
-    GrSLPrecision precision = kDefault_GrSLPrecision;
-    if (fProgramBuilder->ctxInfo().vendor() == kARM_GrGLVendor) {
-        precision = kHigh_GrSLPrecision;
-    }
-
     // setup RT Uniform
     fProgramBuilder->fUniformHandles.fRTAdjustmentUni =
             fProgramBuilder->addUniform(GrGLProgramBuilder::kVertex_Visibility,
-                                        kVec4f_GrSLType, precision,
+                                        kVec4f_GrSLType, kHigh_GrSLPrecision,
                                         fProgramBuilder->rtAdjustment(),
                                         &fRtAdjustName);
     if (this->getProgramBuilder()->desc().header().fSnapVerticesToPixelCenters) {