[arm] Clean up the use of UNALIGNED_ACCESSES.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index 0c9165a303b8ffb7290831a7f4375b6fac0a265c..f984fe9fe48189ef1466e80048a25ece687487a8 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -72,9 +72,6 @@ static unsigned CpuFeaturesImpliedByCompiler() {
 #ifdef CAN_USE_NEON
   if (FLAG_enable_neon) answer |= 1u << NEON;
 #endif  // CAN_USE_VFP32DREGS
-  if ((answer & (1u << ARMv7)) && FLAG_enable_unaligned_accesses) {
-    answer |= 1u << UNALIGNED_ACCESSES;
-  }
 
   return answer;
 }
@@ -104,7 +101,6 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
     if (FLAG_enable_movw_movt) supported_ |= 1u << MOVW_MOVT_IMMEDIATE_LOADS;
     if (FLAG_enable_32dregs) supported_ |= 1u << VFP32DREGS;
   }
-  if (FLAG_enable_unaligned_accesses) supported_ |= 1u << UNALIGNED_ACCESSES;
 
 #else  // __arm__
   // Probe for additional features at runtime.
@@ -124,7 +120,6 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
     if (FLAG_enable_armv8 && cpu.architecture() >= 8) {
       supported_ |= 1u << ARMv8;
     }
-    if (FLAG_enable_unaligned_accesses) supported_ |= 1u << UNALIGNED_ACCESSES;
     // Use movw/movt for QUALCOMM ARMv7 cores.
     if (FLAG_enable_movw_movt && cpu.implementer() == base::CPU::QUALCOMM) {
       supported_ |= 1u << MOVW_MOVT_IMMEDIATE_LOADS;
@@ -202,11 +197,10 @@ void CpuFeatures::PrintTarget() {
 void CpuFeatures::PrintFeatures() {
   printf(
       "ARMv8=%d ARMv7=%d VFP3=%d VFP32DREGS=%d NEON=%d SUDIV=%d "
-      "UNALIGNED_ACCESSES=%d MOVW_MOVT_IMMEDIATE_LOADS=%d",
+      "MOVW_MOVT_IMMEDIATE_LOADS=%d",
       CpuFeatures::IsSupported(ARMv8), CpuFeatures::IsSupported(ARMv7),
       CpuFeatures::IsSupported(VFP3), CpuFeatures::IsSupported(VFP32DREGS),
       CpuFeatures::IsSupported(NEON), CpuFeatures::IsSupported(SUDIV),
-      CpuFeatures::IsSupported(UNALIGNED_ACCESSES),
       CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS));
 #ifdef __arm__
   bool eabi_hardfloat = base::OS::ArmUsingHardFloat();