[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 fdb1ac59ae589c4e99aa1d49dbddad9b305024f9..d52d7374398df7745dcd249c365b6bbf5c854a2a 100644
--- a/content/browser/devtools/protocol/page_handler.h
+++ b/content/browser/devtools/protocol/page_handler.h
@@ -65,6 +65,8 @@ class PageHandler : public DevToolsDomainHandler,
   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,
@@ -101,10 +103,9 @@ class PageHandler : public DevToolsDomainHandler,
                               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 unsigned char* image_data,
+                          size_t data_size);
 
   void OnColorPicked(int r, int g, int b, int a);