Fix snapshotting on linux by creating a separate automation path for

chrome/browser/automation/testing_automation_provider.cc

Index: chrome/browser/automation/testing_automation_provider.cc
diff --git a/chrome/browser/automation/testing_automation_provider.cc b/chrome/browser/automation/testing_automation_provider.cc
index 58a04741f2109e7b289ffce7f17fd92bf98a8d0e..a569d48c6bce90cd8e518b6ad54123b42725f3eb 100644
--- a/chrome/browser/automation/testing_automation_provider.cc
+++ b/chrome/browser/automation/testing_automation_provider.cc
@@ -6186,12 +6186,6 @@ void TestingAutomationProvider::GetTabTitleJSON(
 void TestingAutomationProvider::CaptureEntirePageJSON(
     DictionaryValue* args,
     IPC::Message* reply_message) {
-#if defined(OS_LINUX)
-  // See crbug.com/89777.
-  AutomationJSONReply(this, reply_message).SendError(
-      "Taking a page snapshot is not supported on this platform");
-  return;
-#endif
   if (SendErrorIfModalDialogActive(this, reply_message))
     return;
 
@@ -6215,7 +6209,8 @@ void TestingAutomationProvider::CaptureEntirePageJSON(
     FilePath path(path_str);
     // This will delete itself when finished.
     PageSnapshotTaker* snapshot_taker = new PageSnapshotTaker(
-        this, reply_message, render_view, path);
+        this, reply_message,
+        TabContentsWrapper::GetCurrentWrapperForContents(tab_contents), path);
     snapshot_taker->Start();
   } else {
     AutomationJSONReply(this, reply_message)