Simplify and fix code aging.

src/mips/codegen-mips.cc

Index: src/mips/codegen-mips.cc
diff --git a/src/mips/codegen-mips.cc b/src/mips/codegen-mips.cc
index 51ad4743de1ee0feada8f6aabeb8a7226a3fd631..d237d4adc7b78f5dde5285493fa101405c758be9 100644
--- a/src/mips/codegen-mips.cc
+++ b/src/mips/codegen-mips.cc
@@ -467,29 +467,6 @@ static byte* GetNoCodeAgeSequence(uint32_t* length) {
 }
 
 
-byte* Code::FindPlatformCodeAgeSequence() {
-  byte* start = instruction_start();
-  uint32_t young_length;
-  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
-  if (!memcmp(start, young_sequence, young_length) ||
-      Memory::uint32_at(start) == kCodeAgePatchFirstInstruction) {
-    return start;
-  } else {
-    byte* start_after_strict = NULL;
-    if (kind() == FUNCTION) {
-      start_after_strict = start + kSizeOfFullCodegenStrictModePrologue;
-    } else {
-      ASSERT(kind() == OPTIMIZED_FUNCTION);
-      start_after_strict = start + kSizeOfOptimizedStrictModePrologue;
-    }
-    ASSERT(!memcmp(start_after_strict, young_sequence, young_length) ||
-           Memory::uint32_at(start_after_strict) ==
-           kCodeAgePatchFirstInstruction);
-    return start_after_strict;
-  }
-}
-
-
 bool Code::IsYoungSequence(byte* sequence) {
   uint32_t young_length;
   byte* young_sequence = GetNoCodeAgeSequence(&young_length);