Add --trace-memory option for tracing heap memory

desktop-chromium can trace memory status in about://tracing.
as same as desktop, this patch enables android to use 
disabled-by-default-memory option in adb_profile_chrome script.

BUG=None

Review URL: https://codereview.chromium.org/291723002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@273031 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/chrome_profiler/chrome_controller.py

@@ -11,9 +11,11 @@ from chrome_profiler import controllers
 
 from pylib import pexpect
 
+_HEAP_PROFILE_MMAP_PROPERTY = 'heapprof.mmap'
 
 class ChromeTracingController(controllers.BaseController):
-  def __init__(self, device, package_info, categories, ring_buffer):
+  def __init__(self, device, package_info,
+               categories, ring_buffer, trace_memory=False):
     controllers.BaseController.__init__(self)
     self._device = device
     self._package_info = package_info
@@ -21,6 +23,7 @@ class ChromeTracingController(controllers.BaseController):
     self._ring_buffer = ring_buffer
     self._trace_file = None
     self._trace_interval = None
+    self._trace_memory = trace_memory
     self._trace_start_re = \
        re.compile(r'Logging performance trace to file')
     self._trace_finish_re = \
@@ -59,6 +62,12 @@ class ChromeTracingController(controllers.BaseController):
         self._package_info.package, 'GPU_PROFILER_START',
         '-e categories "%s"' % ','.join(self._categories),
         '-e continuous' if self._ring_buffer else '')
+
+    if self._trace_memory:
+      self._device.old_interface.EnableAdbRoot()
+      self._device.old_interface.system_properties \
+          [_HEAP_PROFILE_MMAP_PROPERTY] = 1
+
     # Chrome logs two different messages related to tracing:
     #
     # 1. "Logging performance trace to file"
@@ -79,6 +88,9 @@ class ChromeTracingController(controllers.BaseController):
         'GPU_PROFILER_STOP')
     self._trace_file = self._device.old_interface.WaitForLogMatch(
         self._trace_finish_re, None, timeout=120).group(1)
+    if self._trace_memory:
+      self._device.old_interface.system_properties \
+          [_HEAP_PROFILE_MMAP_PROPERTY] = 0
 
   def PullTrace(self):
     # Wait a bit for the browser to finish writing the trace file.

android/chrome_profiler/main.py

@@ -32,6 +32,8 @@ def _ComputeChromeCategories(options):
     categories.append('disabled-by-default-gpu.debug*')
   if options.trace_flow:
     categories.append('disabled-by-default-toplevel.flow')
+  if options.trace_memory:
+    categories.append('disabled-by-default-memory')
   if options.chrome_categories:
     categories += options.chrome_categories.split(',')
   return categories
@@ -87,6 +89,9 @@ def _CreateOptionParser():
                          'for GPU data.', action='store_true')
   chrome_opts.add_option('--trace-flow', help='Enable extra trace categories '
                          'for IPC message flows.', action='store_true')
+  chrome_opts.add_option('--trace-memory', help='Enable extra trace categories '
+                         'for memory profile. (tcmalloc required)',
+                         action='store_true')
   parser.add_option_group(chrome_opts)
 
   systrace_opts = optparse.OptionGroup(parser, 'Systrace tracing options')
@@ -181,7 +186,8 @@ When in doubt, just try out --trace-frame-viewer.
         chrome_controller.ChromeTracingController(device,
                                                   package_info,
                                                   chrome_categories,
-                                                  options.ring_buffer))
+                                                  options.ring_buffer,
+                                                  options.trace_memory))
   if systrace_categories:
     enabled_controllers.append(
         systrace_controller.SystraceController(device,