gpu: Remove WebGraphicsContext3D::makeContextCurrent() in Blink

Source/core/html/HTMLVideoElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 Apple 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
@@ skipping 195 matching lines @@
 
     WebCanvas* canvas = context->canvas();
     webMediaPlayer()->paint(canvas, destRect, context->getNormalizedAlpha());
 }
 
 bool HTMLVideoElement::copyVideoTextureToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLint level, GLenum internalFormat, GLenum type, bool premultiplyAlpha, bool flipY)
 {
     if (!webMediaPlayer())
         return false;
 
-    if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(internalFormat, type, level) || !context->makeContextCurrent())
+    if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(internalFormat, type, level))
         return false;
 
     return webMediaPlayer()->copyVideoTextureToPlatformTexture(context, texture, level, internalFormat, type, premultiplyAlpha, flipY);
 }
 
 bool HTMLVideoElement::hasAvailableVideoFrame() const
 {
     if (!webMediaPlayer())
         return false;
 
@@ skipping 89 matching lines @@
 {
     return !hasSingleSecurityOrigin() || (!(webMediaPlayer() && webMediaPlayer()->didPassCORSAccessCheck()) && destinationSecurityOrigin->taintsCanvas(currentSrc()));
 }
 
 FloatSize HTMLVideoElement::sourceSize() const
 {
     return FloatSize(videoWidth(), videoHeight());
 }
 
 }