Rename kDexCacheViaMethod to kRuntimeCall for HLoadClass/String.

The old name does not reflect the actual code anymore.

Test: testrunner.py --host
Change-Id: I2e13cf727bba9d901c4d3fc821bb526d38a775b8
diff --git a/compiler/optimizing/code_generator_x86_64.cc b/compiler/optimizing/code_generator_x86_64.cc
index 6b5e4d6..1d49afc 100644
--- a/compiler/optimizing/code_generator_x86_64.cc
+++ b/compiler/optimizing/code_generator_x86_64.cc
@@ -5483,7 +5483,7 @@
       DCHECK(Runtime::Current()->UseJitCompilation());
       break;
     case HLoadClass::LoadKind::kBootImageAddress:
-    case HLoadClass::LoadKind::kDexCacheViaMethod:
+    case HLoadClass::LoadKind::kRuntimeCall:
       break;
   }
   return desired_class_load_kind;
@@ -5491,7 +5491,7 @@
 
 void LocationsBuilderX86_64::VisitLoadClass(HLoadClass* cls) {
   HLoadClass::LoadKind load_kind = cls->GetLoadKind();
-  if (load_kind == HLoadClass::LoadKind::kDexCacheViaMethod) {
+  if (load_kind == HLoadClass::LoadKind::kRuntimeCall) {
     // Custom calling convention: RAX serves as both input and output.
     CodeGenerator::CreateLoadClassRuntimeCallLocationSummary(
         cls,
@@ -5542,7 +5542,7 @@
 // move.
 void InstructionCodeGeneratorX86_64::VisitLoadClass(HLoadClass* cls) NO_THREAD_SAFETY_ANALYSIS {
   HLoadClass::LoadKind load_kind = cls->GetLoadKind();
-  if (load_kind == HLoadClass::LoadKind::kDexCacheViaMethod) {
+  if (load_kind == HLoadClass::LoadKind::kRuntimeCall) {
     codegen_->GenerateLoadClassRuntimeCall(cls);
     return;
   }
@@ -5653,7 +5653,7 @@
       DCHECK(Runtime::Current()->UseJitCompilation());
       break;
     case HLoadString::LoadKind::kBootImageAddress:
-    case HLoadString::LoadKind::kDexCacheViaMethod:
+    case HLoadString::LoadKind::kRuntimeCall:
       break;
   }
   return desired_string_load_kind;
@@ -5662,7 +5662,7 @@
 void LocationsBuilderX86_64::VisitLoadString(HLoadString* load) {
   LocationSummary::CallKind call_kind = CodeGenerator::GetLoadStringCallKind(load);
   LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(load, call_kind);
-  if (load->GetLoadKind() == HLoadString::LoadKind::kDexCacheViaMethod) {
+  if (load->GetLoadKind() == HLoadString::LoadKind::kRuntimeCall) {
     locations->SetOut(Location::RegisterLocation(RAX));
   } else {
     locations->SetOut(Location::RequiresRegister());