Add SetImageData api to chrome.clipboard.

extensions/browser/test_extensions_browser_client.h

Index: extensions/browser/test_extensions_browser_client.h
diff --git a/extensions/browser/test_extensions_browser_client.h b/extensions/browser/test_extensions_browser_client.h
index ee572fae7981186a5f417f603c919937c0669d4e..1d732174b7174d0b8066ba8c8234ed258172fb55 100644
--- a/extensions/browser/test_extensions_browser_client.h
+++ b/extensions/browser/test_extensions_browser_client.h
@@ -108,6 +108,10 @@ class TestExtensionsBrowserClient : public ExtensionsBrowserClient {
   ExtensionCache* GetExtensionCache() override;
   bool IsBackgroundUpdateAllowed() override;
   bool IsMinBrowserVersionSupported(const std::string& min_version) override;
+  void SaveImageDataToClipboard(const std::vector<char>& image_data,
+                                const std::string& type,
+                                const base::Closure& success_callback,
+                                const base::Closure& error_callback) override;
   ExtensionWebContentsObserver* GetExtensionWebContentsObserver(
       content::WebContents* web_contents) override;
   KioskDelegate* GetKioskDelegate() override;