remove kA1_Config, as it is no longer supported

tests/ImageDecodingTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColor.h"
@@ skipping 130 matching lines @@
 
 // Create a fake ImageDecoder to test setPrefConfigTable for
 // backwards compatibility.
 class PrefConfigTestingImageDecoder : public SkImageDecoder {
 public:
     void testPrefConfigTable(skiatest::Reporter* reporter) {
         // Arbitrary list of Configs. The important thing about
         // the list is that each one is different, so we can test
         // to make sure the correct config is chosen.
         const SkBitmap::Config configs[] = {
-            SkBitmap::kA1_Config,
+            SkBitmap::kA8_Config,
             SkBitmap::kA8_Config,
             SkBitmap::kIndex8_Config,
             SkBitmap::kRGB_565_Config,
             SkBitmap::kARGB_4444_Config,
             SkBitmap::kARGB_8888_Config,
         };
         this->setPrefConfigTable(configs);
         REPORTER_ASSERT(reporter, configs[0] == this->getPrefConfig(kIndex_SrcDepth, false));
         REPORTER_ASSERT(reporter, configs[1] == this->getPrefConfig(kIndex_SrcDepth, true));
         REPORTER_ASSERT(reporter, configs[4] == this->getPrefConfig(k32Bit_SrcDepth, false));
@@ skipping 105 matching lines @@
     test_pref_config_table(reporter);
 #ifdef SK_DEBUG
     test_stream_life();
     test_row_proc_choice();
 #endif
 }
 
 #include "TestClassDef.h"
 DEFINE_TESTCLASS("ImageDecoding", ImageDecodingTestClass,
                  test_imageDecodingTests)