[wasm] Enable Response APIs by default.

Intent to ship: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/T8r1SrZUEZM

Bug: chromium:711083
Change-Id: Ieb9c7b3fcf76d6b13ef0c89d676cecf02b0daa78
Reviewed-on: https://chromium-review.googlesource.com/513531Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486524}

content/public/common/content_features.cc

@@ -319,7 +319,7 @@ const base::Feature kWebAssembly{"WebAssembly",
 
 // Enable WebAssembly streamed compilation.
 const base::Feature kWebAssemblyStreaming{"WebAssemblyStreaming",
-                                          base::FEATURE_DISABLED_BY_DEFAULT};
+                                          base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Enable WebAssembly streamed compilation.
 const base::Feature kWebAssemblyTrapHandler{"WebAssemblyTrapHandler",

third_party/WebKit/LayoutTests/NeverFixTests

@@ -241,8 +241,6 @@ crbug.com/627953 [ Android Linux Mac ] fast/text/symbol-cmap.html [ WontFix ]
 # wasm tests. Currently under virtual/enable_wasm or virtual/enable_wasm_streaming
 crbug.com/642912 http/tests/wasm/ [ WontFix ]
 crbug.com/642912 virtual/mojo-loading/http/tests/wasm/ [ WontFix ]
-crbug.com/712970 http/tests/wasm_streaming/ [ WontFix ]
-crbug.com/712970 virtual/mojo-loading/http/tests/wasm_streaming/ [ WontFix ]
 
 # These tests require audio codecs which are generally not available;
 # these tests can still be run manually with --skiped=ignore.