Remove unused blink::Platform::callOnMainThread implementations

content/child/blink_platform_impl.cc

Index: content/child/blink_platform_impl.cc
diff --git a/content/child/blink_platform_impl.cc b/content/child/blink_platform_impl.cc
index 25faab4b5b5a80c78133361e56a334c2725175dd..b507cb7f503839af6e7500b93392608d5c360af5 100644
--- a/content/child/blink_platform_impl.cc
+++ b/content/child/blink_platform_impl.cc
@@ -1093,11 +1093,6 @@ void BlinkPlatformImpl::stopSharedTimer() {
   shared_timer_.Stop();
 }
 
-void BlinkPlatformImpl::callOnMainThread(
-    void (*func)(void*), void* context) {
-  main_thread_task_runner_->PostTask(FROM_HERE, base::Bind(func, context));
-}
-
 blink::WebGestureCurve* BlinkPlatformImpl::createFlingAnimationCurve(
     blink::WebGestureDevice device_source,
     const blink::WebFloatPoint& velocity,