Use PluginPrefs in ChromePluginServiceFilter to check whether a plugin is enabled.

content/browser/plugin_service_browsertest.cc

Index: content/browser/plugin_service_browsertest.cc
diff --git a/content/browser/plugin_service_browsertest.cc b/content/browser/plugin_service_browsertest.cc
index e1e15b72983c78f3c3a439db8feecb25453e7823..323d8b49bf100fd9d3e83dea4a0d7fa4e398372d 100644
--- a/content/browser/plugin_service_browsertest.cc
+++ b/content/browser/plugin_service_browsertest.cc
@@ -9,6 +9,7 @@
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/browser/browser_thread.h"
+#include "content/browser/resource_context.h"
 #include "content/common/content_switches.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "webkit/plugins/npapi/plugin_list.h"
@@ -17,6 +18,15 @@ namespace {
 
 const char* kNPAPITestPluginMimeType = "application/vnd.npapi-test";
 
+class MockResourceContext : public content::ResourceContext {
+ public:
+  MockResourceContext() {}
+  virtual ~MockResourceContext() {}
+
+ private:
+  virtual void EnsureInitialized() const OVERRIDE {}
+};
+
 // Mock up of the Client and the Listener classes that would supply the
 // communication channel with the plugin.
 class MockPluginProcessHostClient : public PluginProcessHost::Client,
@@ -33,8 +43,11 @@ class MockPluginProcessHostClient : public PluginProcessHost::Client,
   }
 
   // Client implementation.
-  int ID() { return 42; }
-  bool OffTheRecord() { return false; }
+  virtual int ID() OVERRIDE { return 42; }
+  virtual bool OffTheRecord() OVERRIDE { return false; }
+  virtual const content::ResourceContext& GetResourceContext() OVERRIDE {
+    return context_;
+  }
 
   void OnChannelOpened(const IPC::ChannelHandle& handle) {
     ASSERT_TRUE(BrowserThread::CurrentlyOn(BrowserThread::IO));
@@ -63,6 +76,7 @@ class MockPluginProcessHostClient : public PluginProcessHost::Client,
   MOCK_METHOD0(OnChannelListenError, void());
 
  private:
+  MockResourceContext context_;
   IPC::Channel* channel_;
   bool set_plugin_info_called_;
   DISALLOW_COPY_AND_ASSIGN(MockPluginProcessHostClient);
@@ -82,13 +96,20 @@ class PluginServiceTest : public InProcessBrowserTest {
                                    browser_directory.AppendASCII("plugins"));
 #endif
   }
+
+  static void OpenChannelOnIOThread(PluginProcessHost::Client* client) {
+    PluginService::GetInstance()->OpenChannelToNpapiPlugin(
+        0, 0, GURL(), GURL(), kNPAPITestPluginMimeType, client);
+  }
 };
 
 // Try to open a channel to the test plugin. Minimal plugin process spawning
 // test for the PluginService interface.
 IN_PROC_BROWSER_TEST_F(PluginServiceTest, OpenChannelToPlugin) {
-  MockPluginProcessHostClient mock_client;
-  PluginService::GetInstance()->OpenChannelToNpapiPlugin(
-      0, 0, GURL(), kNPAPITestPluginMimeType, &mock_client);
+  ::testing::StrictMock<MockPluginProcessHostClient> mock_client;
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      NewRunnableFunction(&PluginServiceTest::OpenChannelOnIOThread,
+                          &mock_client));
   ui_test_utils::RunMessageLoop();
 }