Add SetImageData api to chrome.clipboard.

chrome/browser/extensions/chrome_extensions_browser_client.h

Index: chrome/browser/extensions/chrome_extensions_browser_client.h
diff --git a/chrome/browser/extensions/chrome_extensions_browser_client.h b/chrome/browser/extensions/chrome_extensions_browser_client.h
index e54f28bc95882cb9ce063210bc186846bbc3b08d..8f86ef404c871fae011fec25a6f9897ebfa2d519 100644
--- a/chrome/browser/extensions/chrome_extensions_browser_client.h
+++ b/chrome/browser/extensions/chrome_extensions_browser_client.h
@@ -30,6 +30,7 @@ namespace extensions {
 class ChromeComponentExtensionResourceManager;
 class ChromeExtensionsAPIClient;
 class ChromeProcessManagerDelegate;
+class ClipboardExtensionHelper;
 
 // Implementation of BrowserClient for Chrome, which includes
 // knowledge of Profiles, BrowserContexts and incognito.
@@ -57,6 +58,10 @@ class ChromeExtensionsBrowserClient : public ExtensionsBrowserClient {
 #if defined(OS_CHROMEOS)
   std::string GetUserIdHashFromContext(
       content::BrowserContext* context) override;
+  void SaveImageDataToClipboard(const std::vector<char>& image_data,

[Devlin, 2016/12/16 02:26:16]

If you're convinced we can't implement this in //extensions, this should go on
the ChromeExtensionsAPIClient.

[jennyz, 2016/12/19 07:01:36]

Done.

+                                api::clipboard::ImageType type,
+                                const base::Closure& success_callback,
+                                const ErrorCallback& error_callback) override;
 #endif
   bool IsGuestSession(content::BrowserContext* context) const override;
   bool IsExtensionIncognitoEnabled(
@@ -138,6 +143,10 @@ class ChromeExtensionsBrowserClient : public ExtensionsBrowserClient {
 
   std::unique_ptr<ExtensionCache> extension_cache_;
 
+#if defined(OS_CHROMEOS)
+  std::unique_ptr<ClipboardExtensionHelper> clipboard_extension_helper_;
+#endif
+
   std::unique_ptr<KioskDelegate> kiosk_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeExtensionsBrowserClient);