Maintain SkPaint in GraphicsContextState.

Source/web/tests/GraphicsContextTest.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
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     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
     context.drawImage(alphaImage.get(), IntPoint(10, 10));
     EXPECT_EQ_RECT(IntRect(10, 10, 90, 90), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
     context.drawImage(alphaImage.get(), IntPoint(20, 10), CompositeSourceIn);
     EXPECT_EQ_RECT(IntRect(10, 20, 90, 80), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
     context.save();
-    context.setAlpha(0.5);
+    context.setAlphaAsFloat(0.5);
     context.drawImage(opaqueImage.get(), IntPoint(25, 15), CompositeSourceIn);
     context.restore();
     EXPECT_EQ_RECT(IntRect(10, 25, 90, 75), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
     context.fillRect(FloatRect(10, 10, 90, 90), opaque, CompositeSourceOver);
     EXPECT_EQ_RECT(IntRect(10, 10, 90, 90), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
     context.drawImage(alphaImage.get(), IntPoint(10, 20), CompositeSourceIn);
     EXPECT_EQ_RECT(IntRect(20, 10, 80, 90), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 
     context.save();
-    context.setAlpha(0.5);
+    context.setAlphaAsFloat(0.5);
     context.drawImage(opaqueImage.get(), IntPoint(15, 25), CompositeSourceIn);
     context.restore();
     EXPECT_EQ_RECT(IntRect(25, 10, 75, 90), context.opaqueRegion().asRect());
     EXPECT_PIXELS_MATCH(bitmap, context.opaqueRegion().asRect());
 }
 
 TEST(GraphicsContextTest, trackOpaqueOvalTest)
 {
     SkBitmap bitmap;
     bitmap.setConfig(SkBitmap::kARGB_8888_Config, 200, 200);
@@ skipping 512 matching lines @@
     controlContext.restore();
     context.endRecording();
     EXPECT_EQ(context.getCTM(), controlContext.getCTM());
 
     controlContext.restore();
     context.endRecording();
     EXPECT_EQ(context.getCTM(), controlContext.getCTM());
 }
 
 } // namespace