Move SourcePosition into separate header file.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 9b439397c3c18f25503787d7476edff9ca95ec56..bda2f26c3e0469e89f11b7c83277a87d501a4af7 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -10,79 +10,18 @@
 #include "src/bailout-reason.h"
 #include "src/compilation-dependencies.h"
 #include "src/signature.h"
+#include "src/source-position.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
-class AstValueFactory;
-class HydrogenCodeStub;
+// Forward declarations.
 class JavaScriptFrame;
 class ParseInfo;
 class ScriptData;
 
 
-// This class encapsulates encoding and decoding of sources positions from
-// which hydrogen values originated.
-// When FLAG_track_hydrogen_positions is set this object encodes the
-// identifier of the inlining and absolute offset from the start of the
-// inlined function.
-// When the flag is not set we simply track absolute offset from the
-// script start.
-class SourcePosition {
- public:
-  static SourcePosition Unknown() {
-    return SourcePosition::FromRaw(kNoPosition);
-  }
-
-  bool IsUnknown() const { return value_ == kNoPosition; }
-
-  uint32_t position() const { return PositionField::decode(value_); }
-  void set_position(uint32_t position) {
-    if (FLAG_hydrogen_track_positions) {
-      value_ = static_cast<uint32_t>(PositionField::update(value_, position));
-    } else {
-      value_ = position;
-    }
-  }
-
-  uint32_t inlining_id() const { return InliningIdField::decode(value_); }
-  void set_inlining_id(uint32_t inlining_id) {
-    if (FLAG_hydrogen_track_positions) {
-      value_ =
-          static_cast<uint32_t>(InliningIdField::update(value_, inlining_id));
-    }
-  }
-
-  uint32_t raw() const { return value_; }
-
- private:
-  static const uint32_t kNoPosition =
-      static_cast<uint32_t>(RelocInfo::kNoPosition);
-  typedef BitField<uint32_t, 0, 9> InliningIdField;
-
-  // Offset from the start of the inlined function.
-  typedef BitField<uint32_t, 9, 23> PositionField;
-
-  friend class HPositionInfo;
-  friend class Deoptimizer;
-
-  static SourcePosition FromRaw(uint32_t raw_position) {
-    SourcePosition position;
-    position.value_ = raw_position;
-    return position;
-  }
-
-  // If FLAG_hydrogen_track_positions is set contains bitfields InliningIdField
-  // and PositionField.
-  // Otherwise contains absolute offset from the script start.
-  uint32_t value_;
-};
-
-
-std::ostream& operator<<(std::ostream& os, const SourcePosition& p);
-
-
 struct InlinedFunctionInfo {
   InlinedFunctionInfo(int parent_id, SourcePosition inline_position,
                       int script_id, int start_position)