Handlify the remaining stub compiler functions for call ICs.

src/stub-cache.h

Index: src/stub-cache.h
diff --git a/src/stub-cache.h b/src/stub-cache.h
index 4f99472ad6fcbd73c0674eed7cc4e3ac78ad351e..89ee9d76d272c77f5573fd06e8d142cc04bde0b1 100644
--- a/src/stub-cache.h
+++ b/src/stub-cache.h
@@ -392,17 +392,11 @@ class StubCompiler BASE_EMBEDDED {
   Handle<Code> CompileCallArguments(Code::Flags flags);
   Handle<Code> CompileCallMiss(Code::Flags flags);
 
-  MUST_USE_RESULT MaybeObject* TryCompileCallMegamorphic(Code::Flags flags);
-  MUST_USE_RESULT MaybeObject* TryCompileCallArguments(Code::Flags flags);
   MUST_USE_RESULT MaybeObject* TryCompileCallMiss(Code::Flags flags);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   Handle<Code> CompileCallDebugBreak(Code::Flags flags);
   Handle<Code> CompileCallDebugPrepareStepIn(Code::Flags flags);
-
-  MUST_USE_RESULT MaybeObject* TryCompileCallDebugBreak(Code::Flags flags);
-  MUST_USE_RESULT MaybeObject* TryCompileCallDebugPrepareStepIn(
-      Code::Flags flags);
 #endif
 
   // Static functions for generating parts of stubs.