[builtins] Start refactoring the Apply builtin.

src/mips/interface-descriptors-mips.cc

Index: src/mips/interface-descriptors-mips.cc
diff --git a/src/mips/interface-descriptors-mips.cc b/src/mips/interface-descriptors-mips.cc
index 4eea1b38ab4b97b1a3a77ebe0a06c12edfc86144..ffc855c53ff1a1d348bf7eafc332eaf9294ec4f2 100644
--- a/src/mips/interface-descriptors-mips.cc
+++ b/src/mips/interface-descriptors-mips.cc
@@ -155,6 +155,16 @@ void CallTrampolineDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void CallVarargsDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // a0 : number of arguments (on the stack, not including receiver)
+  // a1 : the target to call
+  // a2 : arguments list (FixedArray)
+  // t0 : arguments list length (untagged)
+  Register registers[] = {a1, a0, a2, t0};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 void CallForwardVarargsDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // a1: the target to call
@@ -164,6 +174,25 @@ void CallForwardVarargsDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void CallWithArrayLikeDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // a1 : the target to call
+  // a2 : the arguments list
+  Register registers[] = {a1, a2};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+void ConstructVarargsDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // a0 : number of arguments (on the stack, not including receiver)
+  // a1 : the target to call
+  // a3 : the new target
+  // a2 : arguments list (FixedArray)
+  // t0 : arguments list length (untagged)
+  Register registers[] = {a1, a3, a0, a2, t0};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 void ConstructForwardVarargsDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // a1: the target to call
@@ -174,6 +203,15 @@ void ConstructForwardVarargsDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void ConstructWithArrayLikeDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // a1 : the target to call
+  // a3 : the new target
+  // a2 : the arguments list
+  Register registers[] = {a1, a3, a2};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 void ConstructStubDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // a1: target