Generate a custom OSR entrypoint for OSR compiles on all platforms, and transition to optimized cod…

src/mips/lithium-codegen-mips.h

Index: src/mips/lithium-codegen-mips.h
diff --git a/src/mips/lithium-codegen-mips.h b/src/mips/lithium-codegen-mips.h
index 13b58040bd660b444b054a6ff5168c9c53cf5275..8437435199a99040b4caf7a12955930e269b74d5 100644
--- a/src/mips/lithium-codegen-mips.h
+++ b/src/mips/lithium-codegen-mips.h
@@ -227,6 +227,9 @@ class LCodeGen V8_FINAL  BASE_EMBEDDED {
   bool GenerateDeoptJumpTable();
   bool GenerateSafepointTable();
 
+  // Generates the custom OSR entrypoint and sets the osr_pc_offset.
+  void GenerateOsrPrologue();
+
   enum SafepointMode {
     RECORD_SIMPLE_SAFEPOINT,
     RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS