Revert of [Android] Update all Robolectric tests to Robolectric 3.0

chrome/android/junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java

Index: chrome/android/junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java
diff --git a/chrome/android/junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java b/chrome/android/junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java
index 981aed4278df4caed2fd8a82196094fa6ee4ae23..4c85f8ef7bd3ee5baf0744346c329edcc01f3ddc 100644
--- a/chrome/android/junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java
+++ b/chrome/android/junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java
@@ -9,9 +9,6 @@
 
 import android.os.Build;
 
-import org.chromium.base.BaseSwitches;
-import org.chromium.base.CommandLine;
-import org.chromium.base.SysUtils;
 import org.chromium.base.test.util.Feature;
 import org.chromium.chrome.browser.media.router.cast.MediaSink;
 import org.chromium.testing.local.LocalRobolectricTestRunner;
@@ -26,7 +23,8 @@
  * Sink observation tests for ChromeMediaRouter.
  */
 @RunWith(LocalRobolectricTestRunner.class)
-@Config(manifest = Config.NONE)
+@Config(manifest = Config.NONE,
+        shadows = { ChromeMediaRouterTestBase.FakeActivityManager.class })
 public class ChromeMediaRouterSinkObservationTest extends ChromeMediaRouterTestBase {
     @Test
     @Feature({"MediaRouter"})
@@ -94,19 +92,15 @@
 
     @Test
     @Feature({"MediaRouter"})
-    public void testNotLowRamDevice() throws Exception {
-        SysUtils.reset();
-        CommandLine.getInstance().appendSwitch(
-                BaseSwitches.DISABLE_LOW_END_DEVICE_MODE);
+    public void testNotLowRamDevice() {
+        sIsLowRamDevice = false;
         assertTrue(mChromeMediaRouter.startObservingMediaSinks(SOURCE_ID1));
     }
 
     @Test
     @Feature({"MediaRouter"})
-    public void testIsLowRamDevice() throws Exception {
-        SysUtils.reset();
-        CommandLine.getInstance().appendSwitch(
-                BaseSwitches.ENABLE_LOW_END_DEVICE_MODE);
+    public void testIsLowRamDevice() {
+        sIsLowRamDevice = true;
         assertEquals(Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR2,
                      mChromeMediaRouter.startObservingMediaSinks(SOURCE_ID1));
     }