Adding a menu item to take a screenshot under "More Tools" submenu in the Wrench menu.

chrome/browser/ui/browser_commands.cc

Index: chrome/browser/ui/browser_commands.cc
diff --git a/chrome/browser/ui/browser_commands.cc b/chrome/browser/ui/browser_commands.cc
index 445bd497eeac76baff7c614a1ad493c30dd703b9..789e26927a06aefb0204f6bc2695f558c985749d 100644
--- a/chrome/browser/ui/browser_commands.cc
+++ b/chrome/browser/ui/browser_commands.cc
@@ -76,6 +76,12 @@
 #include "net/base/escape.h"
 #include "webkit/common/user_agent/user_agent_util.h"
 
+#if defined(OS_CHROMEOS)
+#include "ash/accelerators/accelerator_controller.h"
+#include "ash/screenshot_delegate.h"
+#include "ash/shell.h"
+#endif
+
 #if defined(OS_WIN)
 #include "chrome/browser/ui/metro_pin_tab_helper_win.h"
 #include "win8/util/win8_util.h"
@@ -942,6 +948,18 @@ void OpenTaskManager(Browser* browser) {
   chrome::ShowTaskManager(browser);
 }
 
+void TakeScreenshot() {

[sky, 2014/01/10 00:02:52]

If this is chromeos specific, then move to browser_commands_chromeos.

[mfomitchev, 2014/01/10 18:06:50]

Done.

+#if defined(OS_CHROMEOS)

[sadrul, 2014/01/09 21:39:33]

I was going to suggest using USE_ASH instead of OS_CHROMEOS. But looks like the
accelerators for taking screenshot are also available on chromeos only (I wonder
why). So this is OK

[mfomitchev, 2014/01/09 22:07:23]

I think that's because on other OSes there are other means to take a screenshot,
like 'Print Scrn' on Windows. I guess this is seen as OS functionality rather
than browser functionality (which makes it weird to put the menu item within the
browser menu, but we don't really have a better place to put it now).

+  content::RecordAction(UserMetricsAction("Menu_Take_Screenshot"));
+  ash::ScreenshotDelegate* screenshot_delegate = ash::Shell::GetInstance()->
+      accelerator_controller()->screenshot_delegate();
+  if (screenshot_delegate &&
+      screenshot_delegate->CanTakeScreenshot()) {
+    screenshot_delegate->HandleTakeScreenshotForAllRootWindows();
+  }
+#endif
+}
+
 void OpenFeedbackDialog(Browser* browser) {
   content::RecordAction(UserMetricsAction("Feedback"));
   chrome::ShowFeedbackPage(browser, std::string(), std::string());