Inherit default text color from MainTheme.

chrome/android/java/res/layout/account_signin_view.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2015 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.
 -->
 <org.chromium.chrome.browser.signin.AccountSigninView
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
@@ skipping 23 matching lines @@
                 <!-- The layout_width/layout_height is set to 16/9 dynamically in Java -->
                 <TextView 
                     android:id="@+id/signin_title"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:gravity="bottom"
                     android:paddingStart="@dimen/signin_chooser_padding"
                     android:paddingEnd="@dimen/signin_chooser_padding"
                     android:paddingBottom="@dimen/signin_chooser_padding"
                     android:background="@color/signin_head_background"
-                    android:textColor="@color/default_text_color"
                     android:textSize="@dimen/fre_title_text_size"
                     android:text="@string/sign_in_to_chrome"/>
 
                 <View 
                     android:layout_width="match_parent"
                     android:layout_height="1dp"
                     android:background="@color/signin_border_line_color"
                     android:alpha="0.08"/>
 
                 <TextView 
                     android:id="@+id/signin_choice_description"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:padding="@dimen/signin_chooser_padding"
                     android:lineSpacingMultiplier="1.4"
                     android:text="@string/signin_account_choice_description"
-                    android:textColor="@color/default_text_color"
                     android:textSize="@dimen/fre_normal_text_size"/>
             </LinearLayout>
         </org.chromium.chrome.browser.signin.AccountSigninChooseView>
 
         <!-- The view that allows the user to confirm signed in account, sync and service personalization -->
         <org.chromium.chrome.browser.signin.AccountSigninConfirmationView
             android:id="@+id/signin_confirmation_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:scrollbars="none"
@@ skipping 23 matching lines @@
                         android:layout_height="64dp"
                         android:layout_marginBottom="24dp"
                         android:scaleType="fitCenter"
                         android:contentDescription="@null"/>
 
                     <TextView
                         android:id="@+id/signin_account_name"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:layout_marginBottom="8dp"
-                        android:textColor="@color/default_text_color"
                         android:textSize="@dimen/fre_title_text_size"
                         android:ellipsize="end"
                         android:maxLines="1"/>
 
                     <TextView
                         android:id="@+id/signin_account_email"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:layout_marginBottom="16dp"
                         android:textColor="@color/descriptive_text_color"
@@ skipping 13 matching lines @@
                 <TextView
                     android:id="@+id/signin_chrome_sync_title"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="16dp"
                     android:layout_marginBottom="8dp"
                     android:layout_below="@id/signin_confirmation_head_body_border"
                     android:paddingStart="16dp"
                     android:paddingEnd="16dp"
                     android:text="@string/sync_confirmation_chrome_sync_title"
-                    android:textColor="@color/default_text_color"
                     android:textSize="@dimen/fre_normal_text_size"
                     android:fontFamily="sans-serif-medium"
                     android:drawableStart="@drawable/chrome_sync_logo"
                     android:drawablePadding="16dp"/>
 
                 <TextView
                     android:id="@+id/signin_chrome_sync_description"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="16dp"
@@ skipping 18 matching lines @@
                 <TextView
                     android:id="@+id/signin_personalize_service_title"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginTop="16dp"
                     android:layout_marginBottom="8dp"
                     android:layout_below="@id/signin_confirmation_body_rule_line"
                     android:paddingStart="16dp"
                     android:paddingEnd="16dp"
                     android:text="@string/sync_confirmation_personalize_services_title"
-                    android:textColor="@color/default_text_color"
                     android:textSize="@dimen/fre_normal_text_size"
                     android:fontFamily="sans-serif-medium"
                     android:drawableStart="@drawable/googleg"
                     android:drawablePadding="16dp"/>
 
                 <TextView
                     android:id="@+id/signin_personalize_service_description"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_marginBottom="32dp"
@@ skipping 74 matching lines @@
 
         <View
             android:id="@+id/positive_button_end_padding"
             android:layout_width="0dp"
             android:layout_height="0dp"
             android:layout_weight="1"
             android:visibility="gone"/>
     </LinearLayout>
 
 </org.chromium.chrome.browser.signin.AccountSigninView>