Add SkSourceGammaTreatment enum so we know how to create mips

src/core/SkImageCacherator.cpp

Index: src/core/SkImageCacherator.cpp
diff --git a/src/core/SkImageCacherator.cpp b/src/core/SkImageCacherator.cpp
index 4a8521743d3acad2ab9c0cf2a2e734e8319ae629..b4101f15c73b59ccffcf48b76eb6605ff52b342a 100644
--- a/src/core/SkImageCacherator.cpp
+++ b/src/core/SkImageCacherator.cpp
@@ -249,7 +249,8 @@ static GrTexture* set_key_and_return(GrTexture* tex, const GrUniqueKey& key) {
  */
 GrTexture* SkImageCacherator::lockTexture(GrContext* ctx, const GrUniqueKey& key,
                                           const SkImage* client, SkImage::CachingHint chint,
-                                          bool willBeMipped) {
+                                          bool willBeMipped,
+                                          SkSourceGammaTreatment gammaTreatment) {
     // Values representing the various texture lock paths we can take. Used for logging the path
     // taken to a histogram.
     enum LockTexturePath {
@@ -315,7 +316,7 @@ GrTexture* SkImageCacherator::lockTexture(GrContext* ctx, const GrUniqueKey& key
     if (this->tryLockAsBitmap(&bitmap, client, chint)) {
         GrTexture* tex = nullptr;
         if (willBeMipped) {
-            tex = GrGenerateMipMapsAndUploadToTexture(ctx, bitmap);
+            tex = GrGenerateMipMapsAndUploadToTexture(ctx, bitmap, gammaTreatment);
         }
         if (!tex) {
             tex = GrUploadBitmapToTexture(ctx, bitmap);
@@ -334,17 +335,20 @@ GrTexture* SkImageCacherator::lockTexture(GrContext* ctx, const GrUniqueKey& key
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 GrTexture* SkImageCacherator::lockAsTexture(GrContext* ctx, const GrTextureParams& params,
+                                            SkSourceGammaTreatment gammaTreatment,
                                             const SkImage* client, SkImage::CachingHint chint) {
     if (!ctx) {
         return nullptr;
     }
 
-    return GrImageTextureMaker(ctx, this, client, chint).refTextureForParams(params);
+    return GrImageTextureMaker(ctx, this, client, chint).refTextureForParams(params,
+                                                                             gammaTreatment);
 }
 
 #else
 
 GrTexture* SkImageCacherator::lockAsTexture(GrContext* ctx, const GrTextureParams&,
+                                            SkSourceGammaTreatment gammaTreatment,
                                             const SkImage* client, SkImage::CachingHint) {
     return nullptr;
 }