favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/android/

chrome/browser/android/tab_android.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/android/tab_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/metrics/histogram.h"
@@ skipping 784 matching lines @@
         GURL(net::EscapeExternalHandlerValue(navigation_params.url().spec()));
     return InterceptNavigationDelegate::ShouldIgnoreNavigation(
         chrome_navigation_params);
   }
 };
 
 }  // namespace
 
 void TabAndroid::SetInterceptNavigationDelegate(JNIEnv* env, jobject obj,
                                                jobject delegate) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   InterceptNavigationDelegate::Associate(
       web_contents(),
       make_scoped_ptr(new ChromeInterceptNavigationDelegate(env, delegate)));
 }
 
 void TabAndroid::AttachToTabContentManager(JNIEnv* env,
                                            jobject obj,
                                            jobject jtab_content_manager) {
   chrome::android::TabContentManager* tab_content_manager =
       chrome::android::TabContentManager::FromJavaObject(jtab_content_manager);
@@ skipping 50 matching lines @@
   //   s^{n+1} / s^{n} = 2100 / 2000
   //   s = 1.05
   //   s^b = 60000
   //   b = ln(60000) / ln(1.05) ~= 225
   UMA_HISTOGRAM_CUSTOM_TIMES("Startup.FirstCommitNavigationTime",
       base::Time::Now() - chrome::android::GetMainEntryPointTime(),
       base::TimeDelta::FromMilliseconds(1),
       base::TimeDelta::FromMinutes(1),
       225);
 }