Make blink media logging verbose on Chromecast

third_party/WebKit/Source/modules/BUILD.gn

Index: third_party/WebKit/Source/modules/BUILD.gn
diff --git a/third_party/WebKit/Source/modules/BUILD.gn b/third_party/WebKit/Source/modules/BUILD.gn
index c0040571b3bcca12d6d0d534c96201596a4bdefd..c495ef929d3d7ed0a9b77070880fe082a2896dd1 100644
--- a/third_party/WebKit/Source/modules/BUILD.gn
+++ b/third_party/WebKit/Source/modules/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/split_static_library.gni")
+import("//build/config/chromecast_build.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/v8.gni")
@@ -58,6 +59,13 @@ target(modules_target_type, "modules") {
 
   defines = [ "BLINK_MODULES_IMPLEMENTATION=1" ]
 
+  if (is_chromecast) {
+    defines += [
+      "BLINK_MSLOG=VLOG(2)",
+      "BLINK_SBLOG=VLOG(2)",
+    ]
+  }
+
   deps = [
     ":make_modules_generated",
     "//components/webmessaging/public/interfaces:interfaces_blink",