Migrate WTF::HashMap::get() to ::at()

third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp

Index: third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp b/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
index 564c12cb3936c7c856d57478763a7a01eb7c53be..ad84527ad8b9630f4f10859f763e861e6a135025 100644
--- a/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/MediaControlsPainter.cpp
@@ -60,7 +60,7 @@ static const float kDisabledAlpha = 0.4;
 static Image* platformResource(const char* name) {
   if (!gMediaControlImageMap)
     gMediaControlImageMap = new MediaControlImageMap();
-  if (Image* image = gMediaControlImageMap->get(name))
+  if (Image* image = gMediaControlImageMap->at(name))
     return image;
   if (Image* image = Image::loadPlatformResource(name).leakRef()) {
     gMediaControlImageMap->set(name, image);