Remove enable-touch-hover flag

This CL reverts "Experiment with emulating mouse hover with touch hover
capable devices"

This reverts commit d74bc3e1.

BUG=418188, 617437

Review-Url: https://codereview.chromium.org/2621073002
Cr-Commit-Position: refs/heads/master@{#442886}

chrome/app/generated_resources.grd

@@ -14698,12 +14698,6 @@ Please check your email at <ph name="ACCOUNT_EMAIL">$2<ex>jane.doe@gmail.com</ex
         Enable "Ok Google"
       </message>
 
-      <message name="IDS_FLAGS_TOUCH_HOVER_NAME" desc="Name of the 'Enable support for hover capable touchscreens' flag.">
-        Support for hover capable touchscreens
-      </message>
-      <message name="IDS_FLAGS_TOUCH_HOVER_DESCRIPTION" desc="Description of the 'Enable support for hover capable touchscreens' flag.">
-        Enables hover feature by holding your finger just over the screen to experience a mouseover event.
-      </message>
       <message name="IDS_ALLOW_INSECURE_LOCALHOST" desc="Name of the 'Allow insecure localhost' flag.">
         Allow invalid certificates for resources loaded from localhost.
       </message>

chrome/browser/about_flags.cc

@@ -1502,9 +1502,6 @@ const FeatureEntry kFeatureEntries[] = {
      IDS_FLAGS_SECCOMP_FILTER_SANDBOX_ANDROID_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(features::kSeccompSandboxAndroid)},
 #endif  // OS_ANDROID
-    {"enable-touch-hover", IDS_FLAGS_TOUCH_HOVER_NAME,
-     IDS_FLAGS_TOUCH_HOVER_DESCRIPTION, kOsAndroid,
-     SINGLE_VALUE_TYPE("enable-touch-hover")},
 #if defined(OS_CHROMEOS)
     {"enable-wifi-credential-sync", IDS_FLAGS_WIFI_CREDENTIAL_SYNC_NAME,
      IDS_FLAGS_WIFI_CREDENTIAL_SYNC_DESCRIPTION, kOsCrOS,

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

@@ -40,7 +40,6 @@ import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputConnection;
 import android.view.inputmethod.InputMethodManager;
 
-import org.chromium.base.CommandLine;
 import org.chromium.base.ObserverList;
 import org.chromium.base.ObserverList.RewindableIterator;
 import org.chromium.base.TraceEvent;
@@ -60,7 +59,6 @@ import org.chromium.content.browser.input.SelectPopup;
 import org.chromium.content.browser.input.SelectPopupDialog;
 import org.chromium.content.browser.input.SelectPopupDropdown;
 import org.chromium.content.browser.input.SelectPopupItem;
-import org.chromium.content.common.ContentSwitches;
 import org.chromium.content_public.browser.AccessibilitySnapshotCallback;
 import org.chromium.content_public.browser.AccessibilitySnapshotNode;
 import org.chromium.content_public.browser.ActionModeCallbackHelper;
@@ -385,9 +383,6 @@ public class ContentViewCore implements AccessibilityStateChangeListener, Displa
     // A ViewAndroidDelegate that delegates to the current container view.
     private ViewAndroidDelegate mViewAndroidDelegate;
 
-    // A flag to determine if we enable hover feature or not.
-    private Boolean mEnableTouchHover;
-
     // NOTE: This object will not be released by Android framework until the matching
     // ResultReceiver in the InputMethodService (IME app) gets gc'ed.
     private ShowKeyboardResultReceiver mShowKeyboardResultReceiver;
@@ -1565,16 +1560,6 @@ public class ContentViewCore implements AccessibilityStateChangeListener, Displa
                 return mBrowserAccessibilityManager.onHoverEvent(offset);
             }
 
-            // TODO(lanwei): Remove this switch once experimentation is complete -
-            // crbug.com/418188
-            if (event.getToolType(0) == MotionEvent.TOOL_TYPE_FINGER) {
-                if (mEnableTouchHover == null) {
-                    mEnableTouchHover =
-                            CommandLine.getInstance().hasSwitch(ContentSwitches.ENABLE_TOUCH_HOVER);
-                }
-                if (!mEnableTouchHover.booleanValue()) return false;
-            }
-
             if (mNativeContentViewCore != 0) {
                 nativeSendMouseEvent(mNativeContentViewCore, event.getEventTime(), eventAction,
                         offset.getX(), offset.getY(), event.getPointerId(0), event.getPressure(0),

content/public/android/java/src/org/chromium/content/common/ContentSwitches.java

@@ -42,9 +42,6 @@ public abstract class ContentSwitches {
     // Native switch - chrome_switches::kDisablePopupBlocking
     public static final String DISABLE_POPUP_BLOCKING = "disable-popup-blocking";
 
-    // Enable mouse hover emulation by holding your finger just over the screen.
-    public static final String ENABLE_TOUCH_HOVER = "enable-touch-hover";
-
     // Native switch kEnableCredentialManagerAPI
     public static final String ENABLE_CREDENTIAL_MANAGER_API = "enable-credential-manager-api";