Format argument of CompressedTexSubImage2D should match format of texture being modified

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

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
index ac5365be9cd94b8f831c97bd7977afd3aeb06bde..b0657c447fbe2dbb3431ec327745872be1d531bd 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
@@ -1914,13 +1914,12 @@ void WebGLRenderingContextBase::compressedTexSubImage2D(GLenum target, GLint lev
         synthesizeGLError(GL_INVALID_ENUM, "compressedTexSubImage2D", "invalid format");
         return;
     }
-    if (!validateCompressedTexFuncData("compressedTexSubImage2D", width, height, format, data))
-        return;
-
-    if (!isWebGL2OrHigher() && format != tex->getInternalFormat(target, level)) {
+    if (format != tex->getInternalFormat(target, level)) {
         synthesizeGLError(GL_INVALID_OPERATION, "compressedTexSubImage2D", "format does not match texture format");
         return;
     }
+    if (!validateCompressedTexFuncData("compressedTexSubImage2D", width, height, format, data))
+        return;
 
     if (!validateCompressedTexSubDimensions("compressedTexSubImage2D", target, level, xoffset, yoffset, width, height, format, tex))
         return;