Add Gradient::addColorStops method

third_party/WebKit/Source/platform/graphics/Gradient.cpp

Index: third_party/WebKit/Source/platform/graphics/Gradient.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/Gradient.cpp b/third_party/WebKit/Source/platform/graphics/Gradient.cpp
index 2ce4c4e14a3604826ae5f6601e5c36f4bf4e562e..e6d5452e85b0b6fa2ec187d3cb3cce459f065b2b 100644
--- a/third_party/WebKit/Source/platform/graphics/Gradient.cpp
+++ b/third_party/WebKit/Source/platform/graphics/Gradient.cpp
@@ -86,6 +86,11 @@ void Gradient::addColorStop(const Gradient::ColorStop& stop) {
   m_cachedShader.reset();
 }
 
+void Gradient::addColorStops(const Vector<Gradient::ColorStop>& stops) {
+  for (const auto& stop : stops)
+    addColorStop(stop);
+}
+
 void Gradient::sortStopsIfNecessary() {
   if (m_stopsSorted)
     return;