PPC: Speed up cctest/test-debug/DebugBreakLoop.

Port a67f31c4

R=yangguo@chromium.org, michael_dawson@ca.ibm.com, jyan@ca.ibm.com, joransiu@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1263863003

Cr-Commit-Position: refs/heads/master@{#29940}

src/full-codegen/ppc/full-codegen-ppc.cc

@@ -413,10 +413,6 @@ void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) {
 
 void FullCodeGenerator::EmitProfilingCounterReset() {
   int reset_value = FLAG_interrupt_budget;
-  if (info_->is_debug()) {
-    // Detect debug break requests as soon as possible.
-    reset_value = FLAG_interrupt_budget >> 4;
-  }
   __ mov(r5, Operand(profiling_counter_));
   __ LoadSmiLiteral(r6, Smi::FromInt(reset_value));
   __ StoreP(r6, FieldMemOperand(r5, Cell::kValueOffset), r0);