Delete FORMAT_RGB and legacy libjpeg support from gfx::JpegCodec

ui/gfx/codec/jpeg_codec.h

Index: ui/gfx/codec/jpeg_codec.h
diff --git a/ui/gfx/codec/jpeg_codec.h b/ui/gfx/codec/jpeg_codec.h
index 5d10be59cb1e3f21dcb79e3c2677630decc2d469..fbc07903ebc8a5cae6f5b6b36dbacc119c91632f 100644
--- a/ui/gfx/codec/jpeg_codec.h
+++ b/ui/gfx/codec/jpeg_codec.h
@@ -23,10 +23,6 @@ namespace gfx {
 class CODEC_EXPORT JPEGCodec {
  public:
   enum ColorFormat {
-    // 3 bytes per pixel (packed), in RGB order regardless of endianness.
-    // This is the native JPEG format.
-    FORMAT_RGB,
-
     // 4 bytes per pixel, in RGBA order in mem regardless of endianness.
     FORMAT_RGBA,
 
@@ -39,15 +35,6 @@ class CODEC_EXPORT JPEGCodec {
     FORMAT_SkBitmap
   };
 
-  enum LibraryVariant {
-    SYSTEM_LIBJPEG = 0,
-    LIBJPEG_TURBO,
-    IJG_LIBJPEG,
-  };
-
-  // This method helps identify at run time which library chromium is using.
-  static LibraryVariant JpegLibraryVariant();
-
   // Encodes the given raw 'input' data, with each pixel being represented as
   // given in 'format'. The encoded JPEG data will be written into the supplied
   // vector and true will be returned on success. On failure (false), the