[arm] Remove unused jump_elimination_allowed parameter to Assembler::branch_offset().

That parameter is just confusing and completely unused.

Review URL: https://codereview.chromium.org/1228763003

Cr-Commit-Position: refs/heads/master@{#29547}

src/arm/assembler-arm.cc

@@ -1308,7 +1308,7 @@ void Assembler::addrmod5(Instr instr, CRegister crd, const MemOperand& x) {
 }
 
 
-int Assembler::branch_offset(Label* L, bool jump_elimination_allowed) {
+int Assembler::branch_offset(Label* L) {
   int target_pos;
   if (L->is_bound()) {
     target_pos = L->pos();

src/arm/assembler-arm.h

@@ -700,7 +700,7 @@ class Assembler : public AssemblerBase {
   // Returns the branch offset to the given label from the current code position
   // Links the label to the current position if it is still unbound
   // Manages the jump elimination optimization if the second parameter is true.
-  int branch_offset(Label* L, bool jump_elimination_allowed);
+  int branch_offset(Label* L);
 
   // Returns true if the given pc address is the start of a constant pool load
   // instruction sequence.
@@ -806,13 +806,11 @@ class Assembler : public AssemblerBase {
   void bx(Register target, Condition cond = al);  // v5 and above, plus v4t
 
   // Convenience branch instructions using labels
-  void b(Label* L, Condition cond = al)  {
-    b(branch_offset(L, cond == al), cond);
-  }
-  void b(Condition cond, Label* L)  { b(branch_offset(L, cond == al), cond); }
-  void bl(Label* L, Condition cond = al)  { bl(branch_offset(L, false), cond); }
-  void bl(Condition cond, Label* L)  { bl(branch_offset(L, false), cond); }
-  void blx(Label* L)  { blx(branch_offset(L, false)); }  // v5 and above
+  void b(Label* L, Condition cond = al) { b(branch_offset(L), cond); }
+  void b(Condition cond, Label* L) { b(L, cond); }
+  void bl(Label* L, Condition cond = al) { bl(branch_offset(L), cond); }
+  void bl(Condition cond, Label* L) { bl(branch_offset(L), cond); }
+  void blx(Label* L) { blx(branch_offset(L)); }  // v5 and above
 
   // Data-processing instructions