[devtools] Support different encodings for Page.CaptureScreenshot.

content/browser/devtools/protocol/page_handler.h

Index: content/browser/devtools/protocol/page_handler.h
diff --git a/content/browser/devtools/protocol/page_handler.h b/content/browser/devtools/protocol/page_handler.h
index 32f80267eb3d92094559c551ead1a7011d8bc636..0bb50c4a1937beac455841fcc14b44f08a66e40f 100644
--- a/content/browser/devtools/protocol/page_handler.h
+++ b/content/browser/devtools/protocol/page_handler.h
@@ -60,6 +60,8 @@ class PageHandler : public Page::Backend,
   Response NavigateToHistoryEntry(int entry_id) override;
 
   void CaptureScreenshot(
+      Maybe<std::string> format,
+      Maybe<int> quality,
       std::unique_ptr<CaptureScreenshotCallback> callback) override;
   Response StartScreencast(Maybe<std::string> format,
                            Maybe<int> quality,
@@ -96,10 +98,12 @@ class PageHandler : public Page::Backend,
                               const base::Time& timestamp,
                               const std::string& data);
 
-  void ScreenshotCaptured(
-      std::unique_ptr<CaptureScreenshotCallback> callback,
-      const unsigned char* png_data,
-      size_t png_size);
+  void ScreenshotCaptured(std::unique_ptr<CaptureScreenshotCallback> callback,
+                          const std::string& format,
+                          int quality,
+                          const SkBitmap& bitmap);
+  void ScreenshotEncoded(std::unique_ptr<CaptureScreenshotCallback> callback,
+                         const std::string& data);
 
   void OnColorPicked(int r, int g, int b, int a);