Add SetImageData api to chrome.clipboard.

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index a644531ad52b257447da814d994ca3beeddc0f4a..c2e670dff7ac0b17870505180004aa5b302b3afa 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -3890,6 +3890,9 @@ From <ph name="DOWNLOAD_DOMAIN">$3<ex>example.com</ex></ph>
         <message name="IDS_EXTENSION_PROMPT_WARNING_CLIPBOARD" desc="Permission string for access to clipboard.">
           Read data you copy and paste
         </message>
+        <message name="IDS_EXTENSION_PROMPT_WARNING_CLIPBOARD_READWRITE" desc="Permission string for acess to clipboard for read and write permission.">
+          Access your clipboard
+        </message>
         <message name="IDS_EXTENSION_PROMPT_WARNING_DEBUGGER" desc="Permission string for access to debugger.">
           Access the page debugger backend
         </message>