ARM: replace RegExpCEntryStub with DirectCEntryStub.

src/arm/regexp-macro-assembler-arm.h

Index: src/arm/regexp-macro-assembler-arm.h
diff --git a/src/arm/regexp-macro-assembler-arm.h b/src/arm/regexp-macro-assembler-arm.h
index 1825752ebc25da4d57a053ea27e3e110af2bf14f..0874ad1ab8e77b082180b272024c926a4c1263c9 100644
--- a/src/arm/regexp-macro-assembler-arm.h
+++ b/src/arm/regexp-macro-assembler-arm.h
@@ -212,14 +212,6 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   // and increments it by a word size.
   inline void Pop(Register target);
 
-  // Calls a C function and cleans up the frame alignment done by
-  // by FrameAlign. The called function *is* allowed to trigger a garbage
-  // collection, but may not take more than four arguments (no arguments
-  // passed on the stack), and the first argument will be a pointer to the
-  // return address.
-  inline void CallCFunctionUsingStub(ExternalReference function,
-                                     int num_arguments);
-
   Isolate* isolate() const { return masm_->isolate(); }
 
   MacroAssembler* masm_;