Convert enable_plugins to a buildflag header.

chrome/common/chrome_content_client_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/common/chrome_content_client.h"
 
 #include <string>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/test/scoped_command_line.h"
 #include "build/build_config.h"
 #include "content/public/common/content_switches.h"
 #include "extensions/common/constants.h"
+#include "ppapi/features/features.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 #include "url/url_util.h"
 
 namespace {
 
 void CheckUserAgentStringOrdering(bool mobile_device) {
   std::vector<std::string> pieces;
 
@@ skipping 65 matching lines @@
 
   // Do it for mobile devices.
   command_line->AppendSwitch(switches::kUseMobileUserAgent);
   ASSERT_TRUE(command_line->HasSwitch(switches::kUseMobileUserAgent));
   CheckUserAgentStringOrdering(true);
 #else
   CheckUserAgentStringOrdering(false);
 #endif
 }
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
 TEST(ChromeContentClientTest, FindMostRecent) {
   std::vector<std::unique_ptr<content::PepperPluginInfo>> version_vector;
   // Test an empty vector.
   EXPECT_EQ(nullptr, ChromeContentClient::FindMostRecentPlugin(version_vector));
 
   // Now test the vector with one element.
   content::PepperPluginInfo info;
   info.version = "1.0.0.0";
   version_vector.push_back(base::MakeUnique<content::PepperPluginInfo>(info));
 
@@ skipping 45 matching lines @@
   // 1. System Flash.
   // 2. Component update.
   version_vector.clear();
   version_vector.push_back(
       base::MakeUnique<content::PepperPluginInfo>(system_flash));
   version_vector.push_back(
       base::MakeUnique<content::PepperPluginInfo>(component_flash));
   most_recent = ChromeContentClient::FindMostRecentPlugin(version_vector);
   EXPECT_STREQ("system_flash", most_recent->name.c_str());
 }
-#endif  // defined(ENABLE_PLUGINS)
+#endif  // BUILDFLAG(ENABLE_PLUGINS)
 
 TEST(ChromeContentClientTest, AdditionalSchemes) {
   EXPECT_TRUE(url::IsStandard(
       extensions::kExtensionScheme,
       url::Component(0, strlen(extensions::kExtensionScheme))));
 
   GURL extension_url(
       "chrome-extension://abcdefghijklmnopqrstuvwxyzabcdef/foo.html");
   url::Origin origin(extension_url);
   EXPECT_EQ("chrome-extension://abcdefghijklmnopqrstuvwxyzabcdef",
             origin.Serialize());
 }
 
 }  // namespace chrome_common