Revert 168457 "WebGL: Transfer ownership of WebGraphicsContext3D..."

trunk/Source/core/html/canvas/WebGLDrawBuffers.cpp

Index: trunk/Source/core/html/canvas/WebGLDrawBuffers.cpp
===================================================================
--- trunk/Source/core/html/canvas/WebGLDrawBuffers.cpp	(revision 168480)
+++ trunk/Source/core/html/canvas/WebGLDrawBuffers.cpp	(working copy)
@@ -79,7 +79,7 @@
         }
         // Because the backbuffer is simulated on all current WebKit ports, we need to change BACK to COLOR_ATTACHMENT0.
         GLenum value = (bufs[0] == GL_BACK) ? GL_COLOR_ATTACHMENT0 : GL_NONE;
-        m_context->webContext()->drawBuffersEXT(1, &value);
+        m_context->webGraphicsContext3D()->drawBuffersEXT(1, &value);
         m_context->setBackDrawBuffer(bufs[0]);
     } else {
         if (n > m_context->maxDrawBuffers()) {
@@ -99,7 +99,7 @@
 // static
 bool WebGLDrawBuffers::satisfiesWebGLRequirements(WebGLRenderingContextBase* webglContext)
 {
-    blink::WebGraphicsContext3D* context = webglContext->webContext();
+    blink::WebGraphicsContext3D* context = webglContext->webGraphicsContext3D();
     Extensions3DUtil* extensionsUtil = webglContext->extensionsUtil();
 
     // This is called after we make sure GL_EXT_draw_buffers is supported.