Remove PixelStorei calls that are no longer necessary.

Source/platform/graphics/gpu/DrawingBuffer.cpp

Index: Source/platform/graphics/gpu/DrawingBuffer.cpp
diff --git a/Source/platform/graphics/gpu/DrawingBuffer.cpp b/Source/platform/graphics/gpu/DrawingBuffer.cpp
index 6c6af0ba37a0502cf9cb51f4fce61a782990d84f..b4eacdf3e892d04d7a68b212ff612fd91f4b2686 100644
--- a/Source/platform/graphics/gpu/DrawingBuffer.cpp
+++ b/Source/platform/graphics/gpu/DrawingBuffer.cpp
@@ -510,13 +510,7 @@ bool DrawingBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platfor
     else if (m_actualAttributes.alpha && !m_actualAttributes.premultipliedAlpha && premultiplyAlpha)
         unpackPremultiplyAlphaNeeded = GL_TRUE;
 
-    context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, unpackUnpremultiplyAlphaNeeded);
-    context->pixelStorei(GC3D_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM, unpackPremultiplyAlphaNeeded);
-    context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, flipY);
     context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, texture, internalFormat, destType, flipY, unpackPremultiplyAlphaNeeded, unpackUnpremultiplyAlphaNeeded);
-    context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, GL_FALSE);
-    context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, GL_FALSE);
-    context->pixelStorei(GC3D_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM, GL_FALSE);
 
     context->deleteTexture(sourceTexture);