Implement easy GPU feature status summary.

content/common/gpu_feature_flags_unittest.cc

Index: content/common/gpu_feature_flags_unittest.cc
diff --git a/content/common/gpu_feature_flags_unittest.cc b/content/common/gpu_feature_flags_unittest.cc
index 3a676c32dafddbaebc52bc267104b53b854d64a5..c016a88a847468e36fc4778d44722e2fd77bb1e0 100644
--- a/content/common/gpu_feature_flags_unittest.cc
+++ b/content/common/gpu_feature_flags_unittest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -50,5 +50,42 @@ TEST(GpuFeatureFlagsTest, GpuFeatureFlagsBasic) {
             GpuFeatureFlags::kGpuFeatureAll);
   EXPECT_EQ(GpuFeatureFlags::StringToGpuFeatureType("xxx"),
             GpuFeatureFlags::kGpuFeatureUnknown);
-}
 
+  // Test GpuFeatureTypeToString for single-bit enums using the all enum
+  EXPECT_STREQ(
+      GpuFeatureFlags::GpuFeatureTypeToString(
+          GpuFeatureFlags::kGpuFeatureAcceleratedCompositing).c_str(),
+      "accelerated_compositing");
+  EXPECT_STREQ(
+      GpuFeatureFlags::GpuFeatureTypeToString(
+          GpuFeatureFlags::kGpuFeatureAccelerated2dCanvas).c_str(),
+      "accelerated_2d_canvas");
+  EXPECT_STREQ(
+      GpuFeatureFlags::GpuFeatureTypeToString(
+          GpuFeatureFlags::kGpuFeatureWebgl).c_str(),
+      "webgl");
+  EXPECT_STREQ(
+      GpuFeatureFlags::GpuFeatureTypeToString(
+          GpuFeatureFlags::kGpuFeatureMultisampling).c_str(),
+      "multisampling");
+  EXPECT_STREQ(
+      GpuFeatureFlags::GpuFeatureTypeToString(
+          GpuFeatureFlags::kGpuFeatureAll).c_str(),
+      "all");
+  EXPECT_STREQ(GpuFeatureFlags::GpuFeatureTypeToString(
+          GpuFeatureFlags::kGpuFeatureUnknown).c_str(),
+      "unknown");
+  EXPECT_STREQ(
+      GpuFeatureFlags::GpuFeatureTypeToString(
+          static_cast<GpuFeatureFlags::GpuFeatureType>(
+              GpuFeatureFlags::kGpuFeatureWebgl |
+              GpuFeatureFlags::kGpuFeatureMultisampling)).c_str(),
+      "webgl,multisampling");
+
+  std::string tmp;
+  tmp = GpuFeatureFlags::GpuFeatureTypeToString(
+      static_cast<GpuFeatureFlags::GpuFeatureType>(
+          GpuFeatureFlags::kGpuFeatureWebgl |
+          GpuFeatureFlags::kGpuFeatureAll));
+  EXPECT_STREQ(tmp.c_str(),  "all");
+}