Add a JS API for detecting WebGL availability.

chrome/browser/extensions/extension_webstore_private_apitest.cc

Index: chrome/browser/extensions/extension_webstore_private_apitest.cc
===================================================================
--- chrome/browser/extensions/extension_webstore_private_apitest.cc	(revision 112547)
+++ chrome/browser/extensions/extension_webstore_private_apitest.cc	(working copy)
@@ -18,6 +18,7 @@
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/ui_test_utils.h"
+#include "content/browser/gpu/gpu_blacklist.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "net/base/mock_host_resolver.h"
@@ -229,3 +230,41 @@
   WebstorePrivateApi::SetTrustTestIDsForTesting(true);
   ASSERT_TRUE(RunPageTest(GetTestServerURL("silently_install.html").spec()));
 }
+
+// Tests getWebGLStatus function when webgl is allowed.
+IN_PROC_BROWSER_TEST_F(ExtensionWebstorePrivateBundleTest,
+                       GetWebGLStatusAllowed) {
+  ASSERT_TRUE(
+      RunPageTest(GetTestServerURL("get_webgl_status_allowed.html").spec()));
+}
+
+// Tests getWebGLStatus function when webgl is blacklisted.
+IN_PROC_BROWSER_TEST_F(ExtensionWebstorePrivateBundleTest,
+                       GetWebGLStatusBlocked) {
+  const std::string json_blacklist =
+      "{\n"
+      "  \"name\": \"gpu blacklist\",\n"
+      "  \"version\": \"1.0\",\n"
+      "  \"entries\": [\n"
+      "    {\n"
+      "      \"id\": 1,\n"
+      "      \"blacklist\": [\n"
+      "        \"webgl\"\n"
+      "      ]\n"
+      "    }\n"
+      "  ]\n"
+      "}";
+  scoped_ptr<Version> os_version(Version::GetVersionFromString("1.0"));
+  GpuBlacklist* blacklist = new GpuBlacklist("1.0");
+
+  ASSERT_TRUE(blacklist->LoadGpuBlacklist(
+      json_blacklist, GpuBlacklist::kAllOs));
+  GpuDataManager::GetInstance()->SetBuiltInGpuBlacklist(blacklist);
+  GpuFeatureFlags flags = GpuDataManager::GetInstance()->GetGpuFeatureFlags();
+  EXPECT_EQ(
+      flags.flags(), static_cast<uint32>(GpuFeatureFlags::kGpuFeatureWebgl));
+
+  ASSERT_TRUE(
+      RunPageTest(GetTestServerURL("get_webgl_status_blocked.html").spec()));
+}
+