Implement TransferableResource StructTraits

cc/resources/resource_format.cc

Index: cc/resources/resource_format.cc
diff --git a/cc/resources/resource_format.cc b/cc/resources/resource_format.cc
index 101aef484a65c8f55bffffa92554d109be5148fc..2eae8307355c7db49bb63febaf2084b81fb62f89 100644
--- a/cc/resources/resource_format.cc
+++ b/cc/resources/resource_format.cc
@@ -9,29 +9,6 @@
 
 namespace cc {
 
-SkColorType ResourceFormatToClosestSkColorType(ResourceFormat format) {
-  // Use kN32_SkColorType if there is no corresponding SkColorType.
-  switch (format) {
-    case RGBA_4444:
-      return kARGB_4444_SkColorType;
-    case RGBA_8888:
-    case BGRA_8888:
-      return kN32_SkColorType;
-    case ALPHA_8:
-      return kAlpha_8_SkColorType;
-    case RGB_565:
-      return kRGB_565_SkColorType;
-    case LUMINANCE_8:
-      return kGray_8_SkColorType;
-    case ETC1:
-    case RED_8:
-    case LUMINANCE_F16:
-      return kN32_SkColorType;
-  }
-  NOTREACHED();
-  return kN32_SkColorType;
-}
-
 int BitsPerPixel(ResourceFormat format) {
   switch (format) {
     case BGRA_8888: