Add "alpha" option to PaintWorklet

third_party/WebKit/Source/modules/csspaint/PaintRenderingContext2DTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/csspaint/PaintRenderingContext2D.h"
 
 #include "platform/graphics/ImageBuffer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 namespace {
 
 static const int s_width = 50;
 static const int s_height = 75;
 
 class PaintRenderingContext2DTest : public ::testing::Test {
 protected:
     void SetUp() override;
 
     Persistent<PaintRenderingContext2D> m_ctx;
 };
 
 void PaintRenderingContext2DTest::SetUp()
 {
-    m_ctx = PaintRenderingContext2D::create(ImageBuffer::create(IntSize(s_width, s_height)));
+    m_ctx = PaintRenderingContext2D::create(ImageBuffer::create(IntSize(s_width, s_height)), false /* hasAlpha */);
 }
 
 void trySettingStrokeStyle(PaintRenderingContext2D* ctx, const String& expected, const String& value)
 {
     StringOrCanvasGradientOrCanvasPattern result, arg, dummy;
     dummy.setString("red");
     arg.setString(value);
     ctx->setStrokeStyle(dummy);
     ctx->setStrokeStyle(arg);
     ctx->strokeStyle(result);
@@ skipping 33 matching lines @@
     EXPECT_EQ(lineJoinAfter, m_ctx->lineJoin());
 
     m_ctx->restore();
 
     EXPECT_EQ(shadowBlurBefore, m_ctx->shadowBlur());
     EXPECT_EQ(lineJoinBefore, m_ctx->lineJoin());
 }
 
 } // namespace
 } // namespace blink