[crankshaft] Move CompilationPhase into separate file.

src/crankshaft/compilation-phase.cc

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/crankshaft/compilation-phase.h"
+
+#include "src/crankshaft/hydrogen.h"
+#include "src/isolate.h"
+
+namespace v8 {
+namespace internal {
+
+CompilationPhase::CompilationPhase(const char* name, CompilationInfo* info)
+    : name_(name), info_(info) {
+  if (FLAG_hydrogen_stats) {
+    info_zone_start_allocation_size_ = info->zone()->allocation_size();
+    timer_.Start();
+  }
+}
+
+CompilationPhase::~CompilationPhase() {
+  if (FLAG_hydrogen_stats) {
+    size_t size = zone()->allocation_size();
+    size += info_->zone()->allocation_size() - info_zone_start_allocation_size_;
+    isolate()->GetHStatistics()->SaveTiming(name_, timer_.Elapsed(), size);
+  }
+}
+
+bool CompilationPhase::ShouldProduceTraceOutput() const {
+  // Trace if the appropriate trace flag is set and the phase name's first
+  // character is in the FLAG_trace_phase command line parameter.
+  AllowHandleDereference allow_deref;
+  bool tracing_on =
+      info()->IsStub()
+          ? FLAG_trace_hydrogen_stubs
+          : (FLAG_trace_hydrogen &&
+             info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
+  return (tracing_on &&
+          base::OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) !=
+              NULL);
+}
+
+}  // namespace internal
+}  // namespace v8