[arm][arm64] Remove COHERENT_CACHE support

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 d5f59663daffa90483760605382e8ee9bf20ce0c..1ccc3a6237cb10467980f790f7ff477071b1bb7e 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -141,15 +141,6 @@ void CpuFeatures::ProbeImpl(bool cross_compile) {
   }
 
   if (FLAG_enable_32dregs && cpu.has_vfp3_d32()) supported_ |= 1u << VFP32DREGS;
-
-  if (cpu.implementer() == base::CPU::NVIDIA &&
-      cpu.variant() == base::CPU::NVIDIA_DENVER &&
-      cpu.part() <= base::CPU::NVIDIA_DENVER_V10) {
-    // TODO(jkummerow): This is turned off as an experiment to see if it
-    // affects crash rates. Keep an eye on crash reports and either remove
-    // coherent cache support permanently, or re-enable it!
-    // supported_ |= 1u << COHERENT_CACHE;
-  }
 #endif
 
   DCHECK(!IsSupported(VFP3) || IsSupported(ARMv7));
@@ -212,18 +203,14 @@ void CpuFeatures::PrintTarget() {
 
 void CpuFeatures::PrintFeatures() {
   printf(
-    "ARMv8=%d ARMv7=%d VFP3=%d VFP32DREGS=%d NEON=%d SUDIV=%d MLS=%d"
-    "UNALIGNED_ACCESSES=%d MOVW_MOVT_IMMEDIATE_LOADS=%d COHERENT_CACHE=%d",
-    CpuFeatures::IsSupported(ARMv8),
-    CpuFeatures::IsSupported(ARMv7),
-    CpuFeatures::IsSupported(VFP3),
-    CpuFeatures::IsSupported(VFP32DREGS),
-    CpuFeatures::IsSupported(NEON),
-    CpuFeatures::IsSupported(SUDIV),
-    CpuFeatures::IsSupported(MLS),
-    CpuFeatures::IsSupported(UNALIGNED_ACCESSES),
-    CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS),
-    CpuFeatures::IsSupported(COHERENT_CACHE));
+      "ARMv8=%d ARMv7=%d VFP3=%d VFP32DREGS=%d NEON=%d SUDIV=%d MLS=%d"
+      "UNALIGNED_ACCESSES=%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(MLS),
+      CpuFeatures::IsSupported(UNALIGNED_ACCESSES),
+      CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS));
 #ifdef __arm__
   bool eabi_hardfloat = base::OS::ArmUsingHardFloat();
 #elif USE_EABI_HARDFLOAT