Add unsized color-renderable formats to getInternalformatParameter

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
index 129af538a8c6dc91515c8c99a0fbcb49a0aed0ca..09620428310d670519d3ebf4aa5787d0628071db 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp
@@ -327,6 +327,11 @@ ScriptValue WebGL2RenderingContextBase::getInternalformatParameter(ScriptState*
     bool floatType = false;
 
     switch (internalformat) {
+    // Renderbuffer doesn't support unsized internal formats,
+    // though GL_RGB and GL_RGBA are color-renderable.
+    case GL_RGB:
+    case GL_RGBA:
+    // Multisampling is not supported for signed and unsigned integer internal formats.
     case GL_R8UI:
     case GL_R8I:
     case GL_R16UI: