Allow and ignore the googLeakyBucket constraint.

third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp

Index: third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp
diff --git a/third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp b/third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp
index ee8148fb7b52fc73a0bb5768f49e01e67328534b..c49865f25ee17426da4f17d13412c1eec61db5d7 100644
--- a/third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp
+++ b/third_party/WebKit/Source/modules/mediastream/MediaConstraintsImpl.cpp
@@ -122,6 +122,11 @@ const char kCpuOveruseEncodeUsage[] = "googCpuOveruseEncodeUsage";
 const char kHighStartBitrate[] = "googHighStartBitrate";
 const char kPayloadPadding[] = "googPayloadPadding";
 // End of names from libjingle
+// Names that have been used in the past, but should now be ignored.
+// Kept around for backwards compatibility.
+// https://crbug.com/579729
+const char kGoogLeakyBucket[] = "googLeakyBucket";
+const char kEnableAutoThrottling[] = "enableAutoThrottling";
 
 // Names used for testing.
 const char kTestConstraint1[] = "valid_and_supported_1";
@@ -352,6 +357,9 @@ static void parseOldStyleNames(const WebVector<WebMediaConstraint>& oldNames, We
             result.googHighStartBitrate.setExact(atoi(constraint.m_value.utf8().c_str()));
         } else if (constraint.m_name.equals(kPayloadPadding)) {
             result.googPayloadPadding.setExact(toBoolean(constraint.m_value));
+        } else if (constraint.m_name.equals(kGoogLeakyBucket)
+            || constraint.m_name.equals(kEnableAutoThrottling)) {
+            WTF_LOG(Media, "Obsolete constraint %s passed", constraint.m_name.utf8().c_str());

[jochen (gone - plz use gerrit), 2016/01/28 08:54:37]

is it reasonable to log something to the console (I doubt any developer will
look at wtf logs)?

         } else if (constraint.m_name.equals(kTestConstraint1)
             || constraint.m_name.equals(kTestConstraint2)) {
             // These constraints are only for testing parsing.