Removed privledged and debug webgl extension handling.

Source/core/html/canvas/WebGLRenderingContextBase.h

Index: Source/core/html/canvas/WebGLRenderingContextBase.h
diff --git a/Source/core/html/canvas/WebGLRenderingContextBase.h b/Source/core/html/canvas/WebGLRenderingContextBase.h
index 7eb2f8033950f40b0ee3670dc9fc340b355f5f67..cad06d85a7ea88659835f6a1a2cab64f362a709c 100644
--- a/Source/core/html/canvas/WebGLRenderingContextBase.h
+++ b/Source/core/html/canvas/WebGLRenderingContextBase.h
@@ -538,19 +538,15 @@ protected:
         ApprovedExtension               = 0x00,
         // Extension that is behind the draft extensions runtime flag:
         DraftExtension                  = 0x01,
-        PrivilegedExtension             = 0x02,
         // Extension that is still in draft state, but has been selectively enabled by default under a prefix. Do not use
         // this for enabling new draft extensions; use the DraftExtension flag instead, and do not use vendor prefixes:
         EnabledDraftExtension           = 0x04,
-        WebGLDebugRendererInfoExtension = 0x08,
     };
 
     class ExtensionTracker {
     public:
         ExtensionTracker(ExtensionFlags flags, const char* const* prefixes)
-            : m_privileged(flags & PrivilegedExtension)
-            , m_draft(flags & DraftExtension)
-            , m_webglDebugRendererInfo(flags & WebGLDebugRendererInfoExtension)
+            : m_draft(flags & DraftExtension)
             , m_prefixes(prefixes)
         {
         }
@@ -559,21 +555,11 @@ protected:
         {
         }
 
-        bool privileged() const
-        {
-            return m_privileged;
-        }
-
         bool draft() const
         {
             return m_draft;
         }
 
-        bool webglDebugRendererInfo() const
-        {
-            return m_webglDebugRendererInfo;
-        }
-
         const char* const* prefixes() const;
         bool matchesNameWithPrefixes(const String&) const;
 
@@ -583,9 +569,7 @@ protected:
         virtual void loseExtension() = 0;
 
     private:
-        bool m_privileged;
         bool m_draft;
-        bool m_webglDebugRendererInfo;
         const char* const* m_prefixes;
     };
 
@@ -866,15 +850,6 @@ protected:
     // Helper for restoration after context lost.
     void maybeRestoreContext(Timer<WebGLRenderingContextBase>*);
 
-    // Determine if we are running privileged code in the browser, for example,
-    // a Safari or Chrome extension.
-    bool allowPrivilegedExtensions() const;
-
-    // Determine if WEBGL_debug_renderer_info extension is enabled. For the
-    // moment it can be enabled either through a chromium finch experiment
-    // or for privileged code in the browser.
-    bool allowWebGLDebugRendererInfo() const;
-
     enum ConsoleDisplayPreference {
         DisplayInConsole,
         DontDisplayInConsole