headless: Enable GL support by default

headless/lib/headless_browser_browsertest.cc

Index: headless/lib/headless_browser_browsertest.cc
diff --git a/headless/lib/headless_browser_browsertest.cc b/headless/lib/headless_browser_browsertest.cc
index a6bbc8bf52db9030098ca541eaf92b5428ad485b..0734e5709b426b96f3e250287989a7e460d36461 100644
--- a/headless/lib/headless_browser_browsertest.cc
+++ b/headless/lib/headless_browser_browsertest.cc
@@ -159,4 +159,18 @@ IN_PROC_BROWSER_TEST_F(HeadlessBrowserTest, HttpsProtocolHandler) {
   EXPECT_EQ(kResponseBody, inner_html);
 }
 
+IN_PROC_BROWSER_TEST_F(HeadlessBrowserTest, WebGLSupported) {
+  HeadlessWebContents* web_contents =
+      browser()->CreateWebContentsBuilder().Build();
+
+  bool webgl_supported;
+  EXPECT_TRUE(EvaluateScript(web_contents,
+                             "document.createElement('canvas').getContext('"

[altimin, 2016/07/26 14:47:05]

nit: Can we try to format this code more nicely?

[Sami, 2016/07/27 14:26:05]

Definitely, done.

+                             "webgl') instanceof WebGLRenderingContext")
+                  ->GetResult()
+                  ->GetValue()
+                  ->GetAsBoolean(&webgl_supported));
+  EXPECT_TRUE(webgl_supported);
+}
+
 }  // namespace headless