[android] Instumentation tests determine whether to install test apk based on Md5Sum.

build/android/pylib/instrumentation/test_runner.py

Index: build/android/pylib/instrumentation/test_runner.py
diff --git a/build/android/pylib/instrumentation/test_runner.py b/build/android/pylib/instrumentation/test_runner.py
index a2692faf65e6c1608765fcb6bff815639150b2c0..aef89cfacd1326fd057fd045ed07958e8a4ce422 100644
--- a/build/android/pylib/instrumentation/test_runner.py
+++ b/build/android/pylib/instrumentation/test_runner.py
@@ -58,7 +58,6 @@ class TestRunner(base_test_runner.BaseTestRunner):
     Args:
       options: An options object with the following required attributes:
       -  build_type: 'Release' or 'Debug'.
-      -  install_apk: Re-installs the apk if opted.
       -  save_perf_json: Whether or not to save the JSON file from UI perf
             tests.
       -  screenshot_failures: Take a screenshot for a test failure
@@ -86,11 +85,12 @@ class TestRunner(base_test_runner.BaseTestRunner):
     self.disable_assertions = options.disable_assertions
     self.test_pkg = test_pkg
     self.ports_to_forward = ports_to_forward
-    self.install_apk = options.install_apk
 
   #override
   def InstallTestPackage(self):
-    if self.install_apk:
+    installed_apk_path = self.adb.GetApplicationPath(
+        self.test_pkg.GetPackageName())
+    if not self.adb.CheckMd5Sum(self.test_pkg.GetApkPath(), installed_apk_path):

[frankf, 2013/07/19 21:53:54]

This seems generic enough to be part of *Install methods in android_commands.py
as opposed to something the caller have to explicitly do.

[craigdh, 2013/07/19 23:38:38]

Done.

       self.test_pkg.Install(self.adb)
 
   #override