Keyboard should not be displayed in tab switcher mode.

chrome/android/shell/java/src/org/chromium/chrome/shell/TabManager.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.shell;
 
 import android.content.Context;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewParent;
+import android.view.inputmethod.InputMethodManager;
 import android.widget.FrameLayout;
 import android.widget.LinearLayout;
 
 import org.chromium.chrome.browser.EmptyTabObserver;
 import org.chromium.chrome.browser.Tab;
 import org.chromium.chrome.browser.tabmodel.EmptyTabModelObserver;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
 import org.chromium.chrome.browser.tabmodel.TabModel.TabSelectionType;
 import org.chromium.chrome.browser.widget.accessibility.AccessibilityTabModelWrapper;
 import org.chromium.content.browser.ContentVideoViewClient;
@@ skipping 186 matching lines @@
                     mContentViewHolder.getContext()).inflate(
                             R.layout.accessibility_tab_switcher, null);
             mTabModelWrapper.setup(null);
             mTabModelWrapper.setTabModelSelector(mTabModelSelector);
         }
 
         if (mTabModelWrapper.getParent() == null) {
             mContentViewHolder.addView(mTabModelWrapper);
         }
         mToolbar.showAddButton(true);
+        InputMethodManager mImm = (InputMethodManager) getContext().getSystemService(
+                Context.INPUT_METHOD_SERVICE);
+        mImm.hideSoftInputFromWindow(mContentViewHolder.getWindowToken(), 0);
     }
 
     /**
      * Returns the visibility status of the tab switcher.
      */
     public boolean isTabSwitcherVisible() {
         return mTabModelWrapper != null && mTabModelWrapper.getParent() == mContentViewHolder;
     }
 
     /**
@@ skipping 16 matching lines @@
         LoadUrlParams loadUrlParams = new LoadUrlParams(url);
         loadUrlParams.setTransitionType(PageTransition.TYPED | PageTransition.FROM_ADDRESS_BAR);
         Tab tab = mTabModelSelector.getCurrentTab();
         if (tab != null) {
             tab.loadUrl(loadUrlParams);
             return tab;
         }
         return createTab(url, TabLaunchType.FROM_KEYBOARD);
     }
 }