Replace ASSERT with DCHECK in core/

third_party/WebKit/Source/core/frame/PlatformEventDispatcher.cpp

Index: third_party/WebKit/Source/core/frame/PlatformEventDispatcher.cpp
diff --git a/third_party/WebKit/Source/core/frame/PlatformEventDispatcher.cpp b/third_party/WebKit/Source/core/frame/PlatformEventDispatcher.cpp
index 464c28a16598136ddc51a8ffc1b6caa0400dfaec..90ccfd1203f220ce8284969b1be3bb5bcbc627a5 100644
--- a/third_party/WebKit/Source/core/frame/PlatformEventDispatcher.cpp
+++ b/third_party/WebKit/Source/core/frame/PlatformEventDispatcher.cpp
@@ -14,7 +14,7 @@ PlatformEventDispatcher::PlatformEventDispatcher()
 
 void PlatformEventDispatcher::AddController(
     PlatformEventController* controller) {
-  ASSERT(controller);
+  DCHECK(controller);
   // TODO: If we can avoid to register a same controller twice, we can change
   // this 'if' to ASSERT.
   if (controllers_.Contains(controller))
@@ -30,7 +30,7 @@ void PlatformEventDispatcher::AddController(
 
 void PlatformEventDispatcher::RemoveController(
     PlatformEventController* controller) {
-  ASSERT(controllers_.Contains(controller));
+  DCHECK(controllers_.Contains(controller));
 
   controllers_.erase(controller);
   if (!is_dispatching_ && controllers_.IsEmpty()) {