[devtools] Support different encodings for Page.CaptureScreenshot.

ui/gfx/image/image_util.h

Index: ui/gfx/image/image_util.h
diff --git a/ui/gfx/image/image_util.h b/ui/gfx/image/image_util.h
index 8f17c368a8cada1d3456f17fc1b53b23c9eef03f..cee54a351f4e93f87be3bace6a65776dfcd9c114 100644
--- a/ui/gfx/image/image_util.h
+++ b/ui/gfx/image/image_util.h
@@ -33,6 +33,10 @@ GFX_EXPORT bool JPEG1xEncodedDataFromImage(const Image& image,
                                            int quality,
                                            std::vector<unsigned char>* dst);
 
+bool JPEG1xEncodedDataFromSkiaRepresentation(const Image& image,

[Avi (use Gerrit), 2017/01/09 16:57:33]

GFX_EXPORT?

[Avi (use Gerrit), 2017/01/09 22:59:57]

Ah, I see, this is for internal use only. Never mind.

+                                             int quality,
+                                             std::vector<unsigned char>* dst);
+
 // Computes the width of any nearly-transparent regions at the sides of the
 // image and returns them in |left| and |right|.  This checks each column of
 // pixels from the outsides in, looking for anything with alpha above a