cc: Add analytic color conversion to shaders

cc/output/shader.h

Index: cc/output/shader.h
diff --git a/cc/output/shader.h b/cc/output/shader.h
index 6be4c5d83848ff7429974bc54df8a1b405146dae..d060f7bfacdafc99f45f5e36bd148218130dfc59 100644
--- a/cc/output/shader.h
+++ b/cc/output/shader.h
@@ -132,6 +132,9 @@ enum YUVAlphaTextureMode {
 enum ColorConversionMode {
   // No color conversion is performed.
   COLOR_CONVERSION_MODE_NONE,
+  // Conversion is done using analytic transfer functions as specified by
+  // SkColorSpaceTransferFn in a uniform array.
+  COLOR_CONVERSION_MODE_ANALYTIC,
   // Conversion is done directly from YUV to output RGB space, via a 3D texture
   // represented as a 2D texture.
   COLOR_CONVERSION_MODE_LUT_FROM_YUV,
@@ -283,6 +286,9 @@ class FragmentShader {
   UVTextureMode uv_texture_mode_ = UV_TEXTURE_MODE_UV;
 
   ColorConversionMode color_conversion_mode_ = COLOR_CONVERSION_MODE_NONE;
+  int color_src_to_dst_primary_matrix_location_ = -1;
+  int color_src_to_linear_tr_fn_location_ = -1;
+  int color_linear_to_dst_tr_fn_location_ = -1;
 
   // YUV uniform locations.
   int y_texture_location_ = -1;