Telemetry: Add option to create a dirty profile as part of a test run

tools/telemetry/telemetry/core/chrome/desktop_browser_finder.py

Index: tools/telemetry/telemetry/core/chrome/desktop_browser_finder.py
diff --git a/tools/telemetry/telemetry/core/chrome/desktop_browser_finder.py b/tools/telemetry/telemetry/core/chrome/desktop_browser_finder.py
index 88ec73ea15556ee04c52adb70b1c7b60b96a449a..833286b6e97ce63d16715978d211c83a86f6d7e4 100644
--- a/tools/telemetry/telemetry/core/chrome/desktop_browser_finder.py
+++ b/tools/telemetry/telemetry/core/chrome/desktop_browser_finder.py
@@ -10,6 +10,7 @@ import sys
 
 from telemetry.core import browser
 from telemetry.core import possible_browser
+from telemetry.core import dirty_profile_creator
 from telemetry.core.chrome import desktop_browser_backend
 from telemetry.core.chrome import linux_platform_backend
 from telemetry.core.chrome import mac_platform_backend
@@ -39,10 +40,11 @@ class PossibleDesktopBrowser(possible_browser.PossibleBrowser):
   def __repr__(self):
     return 'PossibleDesktopBrowser(browser_type=%s)' % self.browser_type
 
-  def Create(self):
+  def _CreateInternal(self, delete_profile_dir_after_run):
     backend = desktop_browser_backend.DesktopBrowserBackend(
         self._options, self._local_executable,
-        self._is_content_shell, self._use_login)
+        self._is_content_shell, self._use_login,
+        delete_profile_dir_after_run=delete_profile_dir_after_run)
     if sys.platform.startswith('linux'):
       p = linux_platform_backend.LinuxPlatformBackend()
     elif sys.platform == 'darwin':
@@ -51,10 +53,22 @@ class PossibleDesktopBrowser(possible_browser.PossibleBrowser):
       p = win_platform_backend.WinPlatformBackend()
     else:
       raise NotImplementedError()
+
     b = browser.Browser(backend, p)
     backend.SetBrowser(b)
     return b
 
+  def Create(self):
+    # If a dirty profile is needed, instantiate an initial browser object and
+    # use that to create a dirty profile.
+    if (self.options.profile_type.startswith('dirty')):
+      b = self._CreateInternal(False)
+      creator = dirty_profile_creator.DirtyProfileCreator(b, self.options)
+      dirty_profile_dir = \
+          creator.CreateDirtyProfile(self.options.profile_type)
+      self.options.profile_dir = dirty_profile_dir
+    return self._CreateInternal(True)
+
   def SupportsOptions(self, options):
     if (len(options.extensions_to_load) != 0) and self._is_content_shell:
       return False