[TTS] Reenable CSMTest suite with longer timeout.

Speculatively re-enables the ContextualSearchManagerTest suite with
the hope that the mysterious underlying flakiness issue has gone
away, or that the longer timeout in this version of the code will
help.

Original disabling CL: https://crrev.com/c/2088007

TBR=twellington@chromium.org

BUG=1058362

Change-Id: I02ea4f209b86b730cc6f40622839ffb12f3753c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094245
Commit-Queue: Donn Denman <donnd@chromium.org>
Reviewed-by: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748287}

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

@@ -125,11 +125,6 @@ import java.util.concurrent.TimeoutException;
         "disable-features=" + ChromeFeatureList.CONTEXTUAL_SEARCH_ML_TAP_SUPPRESSION})
 @Restriction(RESTRICTION_TYPE_NON_LOW_END_DEVICE)
 @RetryOnFailure
-//
-// NOTE -- THIS WHOLE TEST CLASS IS TEMPORARILY DISABLED:
-//
-@DisabledTest(message = "See https://crbug.com/1058362")
-//
 public class ContextualSearchManagerTest {
     @Rule
     public ChromeActivityTestRule<ChromeActivity> mActivityTestRule =
@@ -147,7 +142,7 @@ public class ContextualSearchManagerTest {
     private static final String LOW_PRIORITY_INVALID_SEARCH_ENDPOINT = "/s/invalid";
     private static final String CONTEXTUAL_SEARCH_PREFETCH_PARAM = "&pf=c";
     // The number of ms to delay startup for all tests.
-    private static final int ACTIVITY_STARTUP_DELAY_MS = 1000;
+    private static final int ACTIVITY_STARTUP_DELAY_MS = 5000; // TODO(donnd): reduce!
 
     private ActivityMonitor mActivityMonitor;
     private ContextualSearchFakeServer mFakeServer;