recipes: Switch from 3 ways for requesting clobber builds to 1

scripts/slave/recipe_modules/pgo/api.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from recipe_engine import recipe_api
 
 
 # List of the benchmark that we run during the profiling step.
 #
 # TODO(sebmarchand): Move this into a BenchmarkSuite in telemetry, this way
@@ skipping 39 matching lines @@
 
   def _compile_instrumented_image(self, bot_config):
     """
     Generates the instrumented version of the binaries.
     """
     self.m.chromium.set_config(bot_config['chromium_config_instrument'],
                                **bot_config.get('chromium_config_kwargs'))
     self.m.chromium.runhooks(name='Runhooks: Instrumentation phase.')
     # Remove the profile files from the previous builds.
     self.m.file.rmwildcard('*.pg[cd]', str(self.m.chromium.output_dir))
-    self.m.chromium.compile(name='Compile: Instrumentation phase.',
-                            force_clobber=bot_config.get('clobber', False))
+    self.m.chromium.compile(name='Compile: Instrumentation phase.')
 
   def _run_pgo_benchmarks(self):
     """
     Run a suite of telemetry benchmarks to generate some profiling data.
     """
     for benchmark in _BENCHMARKS_TO_RUN:
       try:
         args = [
             '--checkout-dir', self.m.path['checkout'],
             '--browser-type', self.m.chromium.c.build_config_fs.lower(),
@@ skipping 40 matching lines @@
 
     # First step: compilation of the instrumented build.
     self._compile_instrumented_image(bot_config)
 
     # Second step: profiling of the instrumented build.
     self._run_pgo_benchmarks()
 
     # Third step: Compilation of the optimized build, this will use the
     #     profile data files produced by the previous step.
     self._compile_optimized_image(bot_config)