MIPS: Revert r20974, r20991: Unify and simplify the FastCloneShallowArrayStub.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index b383ea0ea53324a7b6950beb55c477790c1c35c9..160874431f731375a7804796c691380ee74ec188 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -82,11 +82,6 @@ void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
   static Register registers[] = { a3, a2, a1 };
   descriptor->register_param_count_ = 3;
   descriptor->register_params_ = registers;
-  static Representation representations[] = {
-      Representation::Tagged(),
-      Representation::Smi(),
-      Representation::Tagged() };
-  descriptor->register_param_representations_ = representations;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(
           Runtime::kHiddenCreateArrayLiteralStubBailout)->entry;
@@ -230,11 +225,6 @@ static void InitializeArrayConstructorDescriptor(
     descriptor->stack_parameter_count_ = a0;
     descriptor->register_param_count_ = 3;
     descriptor->register_params_ = registers_variable_args;
-    static Representation representations[] = {
-        Representation::Tagged(),
-        Representation::Tagged(),
-        Representation::Integer32() };
-    descriptor->register_param_representations_ = representations;
   }
 
   descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count;
@@ -262,10 +252,6 @@ static void InitializeInternalArrayConstructorDescriptor(
     descriptor->stack_parameter_count_ = a0;
     descriptor->register_param_count_ = 2;
     descriptor->register_params_ = registers_variable_args;
-    static Representation representations[] = {
-        Representation::Tagged(),
-        Representation::Integer32() };
-    descriptor->register_param_representations_ = representations;
   }
 
   descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count;