[iOS] Load chrome_300_percent.pak file on @3x devices.

ui/base/resource/resource_bundle_ios.mm

Index: ui/base/resource/resource_bundle_ios.mm
diff --git a/ui/base/resource/resource_bundle_ios.mm b/ui/base/resource/resource_bundle_ios.mm
index 80cc74a8f6f6cfb44fa4590dbd249225b065d79c..b84f8fe688bdd2c51c59fde2fb874eb831f04318 100644
--- a/ui/base/resource/resource_bundle_ios.mm
+++ b/ui/base/resource/resource_bundle_ios.mm
@@ -54,11 +54,9 @@ void ResourceBundle::LoadCommonResources() {
                         SCALE_FACTOR_200P);
   }
 
-  // TODO(rohitrao): Add a chrome_300_percent file and load it here.  For now,
-  // we are simply falling back to the 200P resources. http://crbug.com/413300.
   if (IsScaleFactorSupported(SCALE_FACTOR_300P)) {
-    AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_200_percent", nil),
-                        SCALE_FACTOR_200P);
+    AddDataPackFromPath(GetResourcesPakFilePath(@"chrome_300_percent", nil),
+                        SCALE_FACTOR_300P);
   }
 }