Fix for Issue 331895: Make gesturenav screenshot greyscale

content/browser/frame_host/navigation_entry_screenshot_manager.cc

Index: content/browser/frame_host/navigation_entry_screenshot_manager.cc
diff --git a/content/browser/frame_host/navigation_entry_screenshot_manager.cc b/content/browser/frame_host/navigation_entry_screenshot_manager.cc
index 0b955fc6d7c5aca41e1a07b02b0a42f5c7fffe66..b7647afb3d6de218cd822da7ba0b20242c3d59f3 100644
--- a/content/browser/frame_host/navigation_entry_screenshot_manager.cc
+++ b/content/browser/frame_host/navigation_entry_screenshot_manager.cc
@@ -49,7 +49,7 @@ class ScreenshotData : public base::RefCountedThreadSafe<ScreenshotData> {
 
   void EncodeOnWorker(const SkBitmap& bitmap) {
     std::vector<unsigned char> data;
-    if (gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, true, &data))
+    if (gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, true, &data, true))
       data_ = new base::RefCountedBytes(data);
   }