Fix the crash issue for debug version when restoring texture binding at Unit 0 in DrawingBuffer::pr…

Source/core/html/canvas/WebGLRenderingContext.cpp

Index: Source/core/html/canvas/WebGLRenderingContext.cpp
diff --git a/Source/core/html/canvas/WebGLRenderingContext.cpp b/Source/core/html/canvas/WebGLRenderingContext.cpp
index 6fc446f5926b724cdaf02b10ba907b997a95b2bf..1faa49d6fe059b38d7383a1e86631ee593da0d0d 100644
--- a/Source/core/html/canvas/WebGLRenderingContext.cpp
+++ b/Source/core/html/canvas/WebGLRenderingContext.cpp
@@ -1660,8 +1660,11 @@ void WebGLRenderingContext::deleteTexture(WebGLTexture* texture)
     if (!deleteObject(texture))
         return;
     for (size_t i = 0; i < m_textureUnits.size(); ++i) {
-        if (texture == m_textureUnits[i].m_texture2DBinding)
+        if (texture == m_textureUnits[i].m_texture2DBinding) {
             m_textureUnits[i].m_texture2DBinding = 0;
+            if (!i)
+                m_drawingBuffer->setTexture2DBinding(0);
+        }
         if (texture == m_textureUnits[i].m_textureCubeMapBinding)
             m_textureUnits[i].m_textureCubeMapBinding = 0;
     }