Enable share by default for Chrome opened CCTs.

BUG=870843

Change-Id: I1ae9d16a9238fd5f669ab487eeed02f45068ba92
Reviewed-on: https://chromium-review.googlesource.com/1162708
Commit-Queue: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Peter Conn <peconn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581269}

chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabIntentDataProvider.java

@@ -226,8 +226,9 @@ public class CustomTabIntentDataProvider extends BrowserSessionDataProvider {
 
         mTitleVisibilityState = IntentUtils.safeGetIntExtra(
                 intent, CustomTabsIntent.EXTRA_TITLE_VISIBILITY_STATE, CustomTabsIntent.NO_TITLE);
-        mShowShareItem = IntentUtils.safeGetBooleanExtra(
-                intent, CustomTabsIntent.EXTRA_DEFAULT_SHARE_MENU_ITEM, false);
+        mShowShareItem = IntentUtils.safeGetBooleanExtra(intent,
+                CustomTabsIntent.EXTRA_DEFAULT_SHARE_MENU_ITEM,
+                mIsOpenedByChrome && mUiType == CustomTabsUiType.DEFAULT);
         mRemoteViews =
                 IntentUtils.safeGetParcelableExtra(intent, CustomTabsIntent.EXTRA_REMOTEVIEWS);
         mClickableViewIds = IntentUtils.safeGetIntArrayExtra(