VM: Use PC offset instead of absolute PC in exception handler info.

runtime/vm/object_test.cc

Index: runtime/vm/object_test.cc
===================================================================
--- runtime/vm/object_test.cc	(revision 43131)
+++ runtime/vm/object_test.cc	(working copy)
@@ -2733,10 +2733,10 @@
   exception_handlers ^= ExceptionHandlers::New(kNumEntries);
   const bool kNeedsStacktrace = true;
   const bool kNoStacktrace = false;
-  exception_handlers.SetHandlerInfo(0, -1, 20, kNeedsStacktrace, false);
-  exception_handlers.SetHandlerInfo(1, 0, 30, kNeedsStacktrace, false);
-  exception_handlers.SetHandlerInfo(2, -1, 40, kNoStacktrace, true);
-  exception_handlers.SetHandlerInfo(3, 1, 150, kNoStacktrace, true);
+  exception_handlers.SetHandlerInfo(0, -1, 20u, kNeedsStacktrace, false);
+  exception_handlers.SetHandlerInfo(1, 0, 30u, kNeedsStacktrace, false);
+  exception_handlers.SetHandlerInfo(2, -1, 40u, kNoStacktrace, true);
+  exception_handlers.SetHandlerInfo(3, 1, 150u, kNoStacktrace, true);
 
   extern void GenerateIncrement(Assembler* assembler);
   Assembler _assembler_;
@@ -2753,12 +2753,12 @@
   handlers.GetHandlerInfo(0, &info);
   EXPECT_EQ(-1, handlers.OuterTryIndex(0));
   EXPECT_EQ(-1, info.outer_try_index);
-  EXPECT_EQ(20, handlers.HandlerPC(0));
+  EXPECT_EQ(20u, handlers.HandlerPCOffset(0));
   EXPECT(handlers.NeedsStacktrace(0));
   EXPECT(!handlers.HasCatchAll(0));
-  EXPECT_EQ(20, info.handler_pc);
+  EXPECT_EQ(20u, info.handler_pc_offset);
   EXPECT_EQ(1, handlers.OuterTryIndex(3));
-  EXPECT_EQ(150, handlers.HandlerPC(3));
+  EXPECT_EQ(150u, handlers.HandlerPCOffset(3));
   EXPECT(!handlers.NeedsStacktrace(3));
   EXPECT(handlers.HasCatchAll(3));
 }