[Mac] Fix chrome::mac::IsJavaScriptEnabledForProfile crash

Bug: 829298
Change-Id: I24c6fb3fde3ad30f00801e096cd034e16642ce35
Reviewed-on: https://chromium-review.googlesource.com/1048625Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Sarah Chan <spqchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557594}

chrome/browser/ui/cocoa/applescript/apple_event_util.mm

@@ -102,6 +102,7 @@ NSAppleEventDescriptor* ValueToAppleEventDescriptor(const base::Value* value) {
 }
 
 bool IsJavaScriptEnabledForProfile(Profile* profile) {
+  DCHECK(profile);
   if (!base::FeatureList::IsEnabled(
           features::kAppleScriptExecuteJavaScriptMenuItem))
     return YES;

chrome/browser/ui/cocoa/applescript/tab_applescript.mm

@@ -105,6 +105,7 @@ void ResumeAppleEventAndSendReply(NSAppleEventManagerSuspensionID suspension_id,
   webContents_ = webContents;
   SessionTabHelper* session_tab_helper =
       SessionTabHelper::FromWebContents(webContents);
+  profile_ = Profile::FromBrowserContext(webContents->GetBrowserContext());
   base::scoped_nsobject<NSNumber> numID(
       [[NSNumber alloc] initWithInt:session_tab_helper->session_id().id()]);
   [self setUniqueID:numID];
@@ -127,6 +128,14 @@ void ResumeAppleEventAndSendReply(NSAppleEventManagerSuspensionID suspension_id,
 }
 
 - (void)setURL:(NSString*)aURL {
+  // If a scripter sets a URL before |webContents_| or |profile_| is set, save
+  // it at a temporary location. Once they're set, -setURL: will be call again
+  // with the temporary URL.
+  if (!profile_ || !webContents_) {
+    [self setTempURL:aURL];
+    return;
+  }
+
   GURL url(base::SysNSStringToUTF8(aURL));
   if (!chrome::mac::IsJavaScriptEnabledForProfile(profile_) &&
       url.SchemeIs(url::kJavaScriptScheme)) {
@@ -134,13 +143,6 @@ void ResumeAppleEventAndSendReply(NSAppleEventManagerSuspensionID suspension_id,
     return;
   }
 
-  // If a scripter sets a URL before the node is added save it at a temporary
-  // location.
-  if (!webContents_) {
-    [self setTempURL:aURL];
-    return;
-  }
-
   // check for valid url.
   if (!url.is_empty() && !url.is_valid()) {
     AppleScript::SetError(AppleScript::errInvalidURL);