Update other unittests to use newly added TestingBrowserProcess::GetGlobal().

chrome/browser/chromeos/power/session_length_limiter_unittest.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/chromeos/power/session_length_limiter.h"
 
 #include <deque>
 #include <utility>
 
 #include "base/callback.h"
@@ skipping 80 matching lines @@
 };
 
 }  // namespace
 
 class SessionLengthLimiterTest : public testing::Test {
  protected:
   SessionLengthLimiterTest() : delegate_(NULL) {
   }
 
   virtual void SetUp() {
-    static_cast<TestingBrowserProcess*>(g_browser_process)->
-        SetLocalState(&local_state_);
+    TestingBrowserProcess::GetGlobal()->SetLocalState(&local_state_);
     SessionLengthLimiter::RegisterPrefs(&local_state_);
 
     delegate_ = new NiceMock<MockSessionLengthLimiterDelegate>;
     ON_CALL(*delegate_, GetCurrentTime())
         .WillByDefault(Invoke(this, &SessionLengthLimiterTest::GetCurrentTime));
     EXPECT_CALL(*delegate_, StopSession()).Times(0);
     runner_ = new ImmediateSingleThreadTaskRunner;
 
     // Initialize the mock clock to a fixed value, ensuring that timezone
     // differences or DST changes do not affect the test.
     now_ = base::Time::UnixEpoch() + base::TimeDelta::FromDays(40 * 365);
     session_start_time_ = now_;
   }
 
   virtual void TearDown() {
-    static_cast<TestingBrowserProcess*>(g_browser_process)->SetLocalState(NULL);
+    TestingBrowserProcess::GetGlobal()->SetLocalState(NULL);
   }
 
   void SetSessionStartTimePref(int64 session_start_time) {
     local_state_.SetUserPref(prefs::kSessionStartTime,
                              base::Value::CreateStringValue(
                                  base::Int64ToString(session_start_time)));
   }
 
   void VerifySessionStartTimePref() {
     base::Time session_start_time(base::Time::FromInternalValue(
@@ skipping 246 matching lines @@
       remaining_.reset(new base::TimeDelta(kZeroTimeDelta));
   }
 
   // Check that the next timer tick does not lead to the session being
   // terminated.
   now_ += kSessionLengthLimitTimerInterval;
   runner_->RunTasks();
 }
 
 }  // namespace chromeos