Add a "disabled" field for GPU Blacklist entries.

content/browser/gpu/gpu_blacklist_unittest.cc

Index: content/browser/gpu/gpu_blacklist_unittest.cc
===================================================================
--- content/browser/gpu/gpu_blacklist_unittest.cc	(revision 101450)
+++ content/browser/gpu/gpu_blacklist_unittest.cc	(working copy)
@@ -725,3 +725,35 @@
             static_cast<uint32>(GpuFeatureFlags::kGpuFeatureWebgl));
 }
 
+TEST_F(GpuBlacklistTest, DisabledEntry) {
+  const std::string disabled_json =
+      "{\n"
+      "  \"name\": \"gpu blacklist\",\n"
+      "  \"version\": \"0.1\",\n"
+      "  \"entries\": [\n"
+      "    {\n"
+      "      \"id\": 1,\n"
+      "      \"disabled\": true,\n"
+      "      \"blacklist\": [\n"
+      "        \"webgl\"\n"
+      "      ]\n"
+      "    }\n"
+      "  ]\n"
+      "}";
+  scoped_ptr<Version> os_version(Version::GetVersionFromString("10.6.4"));
+
+  GpuBlacklist blacklist("1.0 unknown");
+  EXPECT_TRUE(
+      blacklist.LoadGpuBlacklist(disabled_json, GpuBlacklist::kAllOs));
+  GpuFeatureFlags flags = blacklist.DetermineGpuFeatureFlags(
+      GpuBlacklist::kOsWin, os_version.get(), gpu_info());
+  EXPECT_EQ(flags.flags(), 0u);
+  std::vector<uint32> flag_entries;
+  blacklist.GetGpuFeatureFlagEntries(GpuFeatureFlags::kGpuFeatureAll,
+                                     flag_entries);
+  EXPECT_EQ(flag_entries.size(), 0u);
+  blacklist.GetGpuFeatureFlagDisabledEntries(GpuFeatureFlags::kGpuFeatureAll,
+                                             flag_entries);
+  EXPECT_EQ(flag_entries.size(), 1u);
+}
+