Revert of Re-land: cc: Use worker context for one-copy tile initialization.

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 c62ae934d728f5d749514164f5da80fc9094c4bd..ce9fe7d93af86d8c511efae63886b1f9df7316aa 100644
--- a/cc/resources/resource_format.cc
+++ b/cc/resources/resource_format.cc
@@ -87,23 +87,4 @@
   return GLDataFormat(format);
 }
 
-gfx::BufferFormat BufferFormat(ResourceFormat format) {
-  switch (format) {
-    case RGBA_8888:
-      return gfx::BufferFormat::RGBA_8888;
-    case BGRA_8888:
-      return gfx::BufferFormat::BGRA_8888;
-    case RGBA_4444:
-      return gfx::BufferFormat::RGBA_4444;
-    case ALPHA_8:
-    case LUMINANCE_8:
-    case RGB_565:
-    case ETC1:
-    case RED_8:
-      break;
-  }
-  NOTREACHED();
-  return gfx::BufferFormat::RGBA_8888;
-}
-
 }  // namespace cc