Reenable browser_tests InputImeApiTest.BasicApiTest

This seems to work fine on Linux with --gtest_repeat=10.

BUG=882338
TBR=shuchen@chromium.org
Reenabling a test.

Change-Id: I993856797c704a4b438402a97453d4e2b60f72f0
Reviewed-on: https://chromium-review.googlesource.com/c/1356230Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612707}

chrome/browser/ui/views/ime/input_ime_apitest_nonchromeos.cc

@@ -64,9 +64,7 @@ class InputImeApiTest : public ExtensionApiTest {
   DISALLOW_COPY_AND_ASSIGN(InputImeApiTest);
 };
 
-// TODO(crbug.com/882338) This test fails basically once per try run.
-// See bug for details.
-IN_PROC_BROWSER_TEST_F(InputImeApiTest, DISABLED_BasicApiTest) {
+IN_PROC_BROWSER_TEST_F(InputImeApiTest, BasicApiTest) {
   // Manipulates the focused text input client because the follow cursor
   // window requires the text input focus.
   ui::InputMethod* input_method =