Enable win32k lockdown for ppapi processes.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index a008482707f734f6cbdaf599db6771c11240c1d5..383f897602293a4a69fc57bbc7adc128a08b632d 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -784,11 +784,6 @@ class CONTENT_EXPORT ContentBrowserClient {
   // an AppContainer.
   virtual base::string16 GetAppContainerSidForSandboxType(
       int sandbox_type) const;
-
-  // Returns whether the Win32k lockdown process mitigation should be applied to
-  // a process hosting a plugin with the specified |mime_type|.
-  virtual bool IsWin32kLockdownEnabledForMimeType(
-      const std::string& mime_type) const;
 #endif
 };