Remove unnecessary dep injection in test

PopupZoomerTest doesn't need a test ImeAdapter and
InputMethodManagerWrapper instance in CVC for its tests to pass.
Previously the tests needed a mock instance to avoid NPE,
but CVC was refactored not to require it. This CL deletes the code
setting the test instance to CVC.

Change-Id: I602f475e2b0e5e76883f980564e7e137b185c823
Reviewed-on: https://chromium-review.googlesource.com/894964Reviewed-by: Bo <boliu@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533219}

content/public/android/javatests/src/org/chromium/content/browser/PopupZoomerTest.java

@@ -24,9 +24,7 @@ import org.junit.runner.RunWith;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.test.util.Feature;
 import org.chromium.content.browser.test.ContentJUnit4ClassRunner;
-import org.chromium.content.browser.test.util.TestInputMethodManagerWrapper;
 import org.chromium.content.browser.webcontents.WebContentsImpl;
-import org.chromium.content_public.browser.ImeAdapter;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_shell_apk.ContentShellActivityTestRule;
 
@@ -100,12 +98,8 @@ public class PopupZoomerTest {
                 WebContents webContents = mActivityTestRule.getContentViewCore().getWebContents();
                 mContentViewCore = (ContentViewCoreImpl) ContentViewCore.create(context, "");
                 mContentViewCore.setWebContentsForTesting((WebContentsImpl) webContents);
-                ViewGroup containerView = mActivityTestRule.getContentViewCore().getContainerView();
-                ImeAdapter imeAdapter = ImeAdapter.fromWebContents(webContents);
-                imeAdapter.setInputMethodManagerWrapperForTest(
-                        TestInputMethodManagerWrapper.create(imeAdapter));
-                mPopupZoomer = createPopupZoomerForTest(
-                        InstrumentationRegistry.getTargetContext(), containerView);
+                mPopupZoomer = createPopupZoomerForTest(InstrumentationRegistry.getTargetContext(),
+                        mActivityTestRule.getContentViewCore().getContainerView());
                 TapDisambiguator.fromWebContents(webContents).setPopupZoomerForTest(mPopupZoomer);
             }
         });