disable ETC1 on ANGLE's ES3

third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureETC1.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureETC1.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureETC1.cpp b/third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureETC1.cpp
index 8a0819131f143ba3b703b014173df2abe8057a9c..eecc0267537d11d75d139ae5cdb5d1cfbce330bd 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureETC1.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLCompressedTextureETC1.cpp
@@ -27,8 +27,12 @@ WebGLCompressedTextureETC1* WebGLCompressedTextureETC1::create(
 
 bool WebGLCompressedTextureETC1::supported(WebGLRenderingContextBase* context) {
   Extensions3DUtil* extensionsUtil = context->extensionsUtil();
-  return extensionsUtil->supportsExtension(
-      "GL_OES_compressed_ETC1_RGB8_texture");
+  bool webgl1 = !context->isWebGL2OrHigher();
+  bool etc1 =
+      extensionsUtil->supportsExtension("GL_OES_compressed_ETC1_RGB8_texture");
+  bool etc =
+      extensionsUtil->supportsExtension("GL_CHROMIUM_compressed_texture_etc");
+  return (webgl1 || etc) && etc1;
 }
 
 const char* WebGLCompressedTextureETC1::extensionName() {