Remove the concept of user stylesheets.

Source/testing/runner/TestRunner.h

Index: Source/testing/runner/TestRunner.h
diff --git a/Source/testing/runner/TestRunner.h b/Source/testing/runner/TestRunner.h
index b12cdd9d0c206a16bb2d4043ff19aaaba7ef4c69..794ba6d3a165ff1008eccc13a0ca81c6002ad41c 100644
--- a/Source/testing/runner/TestRunner.h
+++ b/Source/testing/runner/TestRunner.h
@@ -241,8 +241,8 @@ private:
     // Forces the selection colors for testing under Linux.
     void forceRedSelectionColors(const CppArgumentList&, CppVariant*);
 
-    // Adds a user style sheet to be injected into new documents.
-    void addUserStyleSheet(const CppArgumentList&, CppVariant*);
+    // Adds a style sheet to be injected into new documents.
+    void injectStyleSheet(const CppArgumentList&, CppVariant*);
 
     void startSpeechInput(const CppArgumentList&, CppVariant*);
 
@@ -297,11 +297,6 @@ private:
     ///////////////////////////////////////////////////////////////////////////
     // Methods modifying WebPreferences.
 
-    // Passes through to WebPreferences which allows the user to have a custom
-    // style sheet.
-    void setUserStyleSheetEnabled(const CppArgumentList&, CppVariant*);
-    void setUserStyleSheetLocation(const CppArgumentList&, CppVariant*);
-
     // Passes this preference through to WebSettings.
     void setAuthorAndUserStylesEnabled(const CppArgumentList&, CppVariant*);
 
@@ -579,8 +574,6 @@ private:
 
     WorkQueue m_workQueue;
 
-    blink::WebURL m_userStyleSheetLocation;
-
     // globalFlag is used by a number of layout tests in http/tests/security/dataURL.
     CppVariant m_globalFlag;