fixed uninit error in chromedriver unittests Device::ForwardDevtoolsPort

BUG=393231
R=frankf@chromium.org
TEST=Dr.Memory

Review URL: https://codereview.chromium.org/388863003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282673 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/chromedriver/chrome/device_manager_unittest.cc

@@ -67,6 +67,7 @@ class FakeAdb : public Adb {
   virtual Status GetPidByName(const std::string& device_serial,
                               const std::string& process_name,
                               int* pid) OVERRIDE {
+    *pid = 0; // avoid uninit error crbug.com/393231
     return Status(kOk);
   }
 };