Remove WebKit::Platform dependencies from cc

cc/delay_based_time_source.cc

Index: cc/delay_based_time_source.cc
diff --git a/cc/delay_based_time_source.cc b/cc/delay_based_time_source.cc
index d2334105f264d4323a5d8d6c98dafe286aa09932..0beb72b3130f9a96c22c2f7d39445ae53d028f7f 100644
--- a/cc/delay_based_time_source.cc
+++ b/cc/delay_based_time_source.cc
@@ -11,6 +11,8 @@
 
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
+#include "base/message_loop.h"
+#include "cc/thread.h"
 
 namespace cc {
 
@@ -40,7 +42,8 @@ DelayBasedTimeSource::DelayBasedTimeSource(base::TimeDelta interval, Thread* thr
     , m_currentParameters(interval, base::TimeTicks())
     , m_nextParameters(interval, base::TimeTicks())
     , m_state(STATE_INACTIVE)
-    , m_timer(thread, this)
+    , m_thread(thread)
+    , m_weakFactory(ALLOW_THIS_IN_INITIALIZER_LIST(this))
 {
 }
 
@@ -53,7 +56,7 @@ void DelayBasedTimeSource::setActive(bool active)
     TRACE_EVENT1("cc", "DelayBasedTimeSource::setActive", "active", active);
     if (!active) {
         m_state = STATE_INACTIVE;
-        m_timer.stop();
+        m_weakFactory.InvalidateWeakPtrs();
         return;
     }
 
@@ -65,7 +68,7 @@ void DelayBasedTimeSource::setActive(bool active)
         // it runs, we use that to establish the timebase, become truly active, and
         // fire the first tick.
         m_state = STATE_STARTING;
-        m_timer.startOneShot(0);
+        m_thread->postTask(base::Bind(&DelayBasedTimeSource::onTimerFired, m_weakFactory.GetWeakPtr()));
         return;
     }
 
@@ -222,7 +225,9 @@ void DelayBasedTimeSource::postNextTickTask(base::TimeTicks now)
     base::TimeDelta delay = newTickTarget - now;
     DCHECK(delay.InMillisecondsF() <=
            m_nextParameters.interval.InMillisecondsF() * (1.0 + doubleTickThreshold));
-    m_timer.startOneShot(delay.InSecondsF());
+    m_thread->postDelayedTask(base::Bind(&DelayBasedTimeSource::onTimerFired,
+                                         m_weakFactory.GetWeakPtr()),
+                              delay.InMilliseconds());
 
     m_nextParameters.tickTarget = newTickTarget;
     m_currentParameters = m_nextParameters;