Change SkColor4f to RGBA channel order

tests/Float16Test.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 #include "SkAutoPixmapStorage.h"
 #include "SkColor.h"
@@ skipping 25 matching lines @@
 DEF_TEST(color_half_float, reporter) {
     const int w = 100;
     const int h = 100;
 
     SkImageInfo info = SkImageInfo::Make(w, h, kRGBA_F16_SkColorType, kPremul_SkAlphaType);
 
     SkAutoPixmapStorage pm;
     pm.alloc(info);
     REPORTER_ASSERT(reporter, pm.getSafeSize() == SkToSizeT(w * h * sizeof(uint64_t)));
 
-    SkColor4f c4 { 0.5f, 1, 0.5f, 0.25f };
+    SkColor4f c4 { 1, 0.5f, 0.25f, 0.5f };
     pm.erase(c4);
 
     SkPM4f origpm4 = c4.premul();
     for (int y = 0; y < pm.height(); ++y) {
         for (int x = 0; x < pm.width(); ++x) {
             SkPM4f pm4 = SkPM4f::FromF16(pm.addrF16(x, y));
             REPORTER_ASSERT(reporter, eq_within_half_float(origpm4, pm4));
         }
     }
 }
@@ skipping 50 matching lines @@
             bool ok = (h1 == h2 || h1 == h2-1);
             REPORTER_ASSERT(r, ok);
             if (!ok) {
                 SkDebugf("%08x (%d) -> %04x (%d), want %04x (%d)\n",
                          bits, bits>>23, h1, h1>>10, h2, h2>>10);
                 break;
             }
         }
     }
 }