Update from https://crrev.com/308331

cc/output/shader.cc

Index: cc/output/shader.cc
diff --git a/cc/output/shader.cc b/cc/output/shader.cc
index e22e4464a515974d4744722ab65c9a5e6d1e4c03..5bc704497ca5b63c24547ac5d9ea15092783b454 100644
--- a/cc/output/shader.cc
+++ b/cc/output/shader.cc
@@ -695,14 +695,14 @@ std::string FragmentTexBlendMode::SetBlendModeFunctions(
   // clang-format off
   static const std::string kFunctionApplyBlendMode = SHADER0(
       // clang-format on
-      uniform SamplerType s_backdropTexture;
+      uniform sampler2D s_backdropTexture;
       uniform TexCoordPrecision vec4 backdropRect;
 
       vec4 GetBackdropColor() {
         TexCoordPrecision vec2 bgTexCoord = gl_FragCoord.xy - backdropRect.xy;
         bgTexCoord.x /= backdropRect.z;
         bgTexCoord.y /= backdropRect.w;
-        return TextureLookup(s_backdropTexture, bgTexCoord);
+        return texture2D(s_backdropTexture, bgTexCoord);
       }
 
       vec4 ApplyBlendMode(vec4 src) {