Add SetImageData api to chrome.clipboard.

chrome/common/extensions/permissions/chrome_permission_message_rules.cc

Index: chrome/common/extensions/permissions/chrome_permission_message_rules.cc
diff --git a/chrome/common/extensions/permissions/chrome_permission_message_rules.cc b/chrome/common/extensions/permissions/chrome_permission_message_rules.cc
index 1f05d5b46fa3d6910a203da12264cc9587ebd575..c206272eda8e47dec297e3057846e1814d226428 100644
--- a/chrome/common/extensions/permissions/chrome_permission_message_rules.cc
+++ b/chrome/common/extensions/permissions/chrome_permission_message_rules.cc
@@ -571,6 +571,9 @@ ChromePermissionMessageRule::GetAllRules() {
       {IDS_EXTENSION_PROMPT_WARNING_CLIPBOARD,
        {APIPermission::kClipboardRead},
        {}},
+      {IDS_EXTENSION_PROMPT_WARNING_CLIPBOARD_WRITE,
+       {APIPermission::kClipboardWrite},

[dcheng, 2016/10/04 05:13:27]

In the past, we intentionally didn't add a prompt for this, to avoid warning
fatigue.

[jennyz, 2016/10/04 23:53:54]

But is it OK not to warn user about the clipboard write? The current
kClipboardRead warning prompt only warns about clipboard read, "Read data you
copy and paste". Or should we make a new one that warn user about read/write
clipboard in one message instead of, such as "Read and write data you copy and
paste"?

+       {}},
       {IDS_EXTENSION_PROMPT_WARNING_DESKTOP_CAPTURE,
        {APIPermission::kDesktopCapture},
        {}},