Revert of experiment: float color components

src/core/SkShader.cpp

Index: src/core/SkShader.cpp
diff --git a/src/core/SkShader.cpp b/src/core/SkShader.cpp
index 856b6592134ff01451919c48383976fac6cd9a32..bd3876a69b988a0d329e7e1e9abed02052223d12 100644
--- a/src/core/SkShader.cpp
+++ b/src/core/SkShader.cpp
@@ -115,10 +115,6 @@
 
 SkShader::Context::ShadeProc SkShader::Context::asAShadeProc(void** ctx) {
     return nullptr;
-}
-
-void SkShader::Context::shadeSpan4f(int x, int y, SkPM4f[], int count) {
-    SkASSERT(false && "shadeSpan4f called but not implemented");
 }
 
 #include "SkColorPriv.h"
@@ -283,11 +279,7 @@
     }
     fPMColor = SkPackARGB32(a, r, g, b);
 
-    SkColor4f c4 = SkColor4f::FromColor(shader.fColor);
-    c4.fA *= rec.fPaint->getAlpha() / 255.0f;
-    fPM4f = c4.premul();
-
-    fFlags = kConstInY32_Flag | kSupports4f_Flag;
+    fFlags = kConstInY32_Flag;
     if (255 == a) {
         fFlags |= kOpaqueAlpha_Flag;
     }
@@ -299,12 +291,6 @@
 
 void SkColorShader::ColorShaderContext::shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) {
     memset(alpha, SkGetPackedA32(fPMColor), count);
-}
-
-void SkColorShader::ColorShaderContext::shadeSpan4f(int x, int y, SkPM4f span[], int count) {
-    for (int i = 0; i < count; ++i) {
-        span[i] = fPM4f;
-    }
 }
 
 SkShader::GradientType SkColorShader::asAGradient(GradientInfo* info) const {