Cleaned up calling-related methods in the ARM assembler.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
===================================================================
--- src/arm/assembler-arm.h	(revision 8479)
+++ src/arm/assembler-arm.h	(working copy)
@@ -378,7 +378,6 @@
   INLINE(explicit Operand(int32_t immediate,
          RelocInfo::Mode rmode = RelocInfo::NONE));
   INLINE(explicit Operand(const ExternalReference& f));
-  INLINE(explicit Operand(const char* s));
   explicit Operand(Handle<Object> handle);
   INLINE(explicit Operand(Smi* value));
 
@@ -1141,10 +1140,15 @@
   void jmp(Label* L) { b(L, al); }
 
   // Check the code size generated from label to here.
-  int InstructionsGeneratedSince(Label* l) {
-    return (pc_offset() - l->pos()) / kInstrSize;
+  int SizeOfCodeGeneratedSince(Label* label) {
+    return pc_offset() - label->pos();
   }
 
+  // Check the number of instructions generated from label to here.
+  int InstructionsGeneratedSince(Label* label) {
+    return SizeOfCodeGeneratedSince(label) / kInstrSize;
+  }
+
   // Check whether an immediate fits an addressing mode 1 instruction.
   bool ImmediateFitsAddrMode1Instruction(int32_t imm32);