Remove stack_frame_<arch>.cc files.

runtime/vm/stack_frame_x64.h

Index: runtime/vm/stack_frame_x64.h
===================================================================
--- runtime/vm/stack_frame_x64.h	(revision 22469)
+++ runtime/vm/stack_frame_x64.h	(working copy)
@@ -9,24 +9,31 @@
 
 /* X64 Dart Frame Layout
 
-               |                   | <- TOS
-Callee frame   | ...               |
-               | current ret addr  |    (PC of current frame)
-               +-------------------+
-Current frame  | ...               | <- RSP of current frame
-               | first local       |
-               | PC Marker         |    (current frame's code entry)
-               | caller's RBP      | <- RBP of current frame
-               | caller's ret addr |    (PC of caller frame)
-               +-------------------+
-Caller frame   | last parameter    |
-               |  ...              |
+               |                    | <- TOS
+Callee frame   | ...                |
+               | current ret addr   |    (PC of current frame)
+               +--------------------+
+Current frame  | ...                | <- RSP of current frame
+               | first local        |
+               | PC marker          |    (current frame's code entry + offset)
+               | caller's RBP       | <- RBP of current frame
+               | caller's ret addr  |    (PC of caller frame)
+               +--------------------+
+Caller frame   | last parameter     | <- RSP of caller frame
+               |  ...               |
 */
 
-static const int kLastParamSlotIndex = 2;  // From fp.
-static const int kFirstLocalSlotIndex = -2;  // From fp.
-static const int kPcSlotIndexFromSp = -1;
+static const int kSavedPcSlotFromSp = -1;
+static const int kFirstLocalSlotFromFp = -2;
+static const int kPcMarkerSlotFromFp = -1;
+static const int kSavedCallerFpSlotFromFp = 0;
+static const int kParamEndSlotFromFp = 1;  // Same slot as caller's ret addr.
+static const int kCallerSpSlotFromFp = 2;
 
+// Entry and exit frame layout.
+static const int kSavedContextSlotFromEntryFp = -9;
+static const int kExitLinkSlotFromEntryFp = -8;
+
 }  // namespace dart
 
 #endif  // VM_STACK_FRAME_X64_H_