Allow only a user gesture to trigger autofill popup

content/test/mock_keyboard.cc

Index: content/test/mock_keyboard.cc
diff --git a/content/test/mock_keyboard.cc b/content/test/mock_keyboard.cc
index 55b695d44d50c63ddeec3a695ab55f1ff1b27383..d082e9f13fd708ff8bcad0dbce1c36114567be3a 100644
--- a/content/test/mock_keyboard.cc
+++ b/content/test/mock_keyboard.cc
@@ -16,30 +16,34 @@ MockKeyboard::MockKeyboard()
 MockKeyboard::~MockKeyboard() {
 }
 
-int MockKeyboard::GetCharacters(Layout layout,
-                                int key_code,
-                                Modifiers modifiers,
-                                std::wstring* output) {
-#if defined(OS_WIN)
-  CHECK(output);
+bool MockKeyboard::Update(Layout layout, Modifiers modifiers) {
   // Change the keyboard layout only when we have to because it takes a lot of
   // time to load a keyboard-layout driver.
   // When we change the layout, we reset the modifier status to force updating
   // the keyboard status.
   if (layout != keyboard_layout_) {
+#if defined(OS_WIN)
     if (!driver_.SetLayout(layout))
-      return -1;
+      return false;
+#endif
     keyboard_layout_ = layout;
     keyboard_modifiers_ = INVALID;
   }
 
   // Update the keyboard states.
   if (modifiers != keyboard_modifiers_) {
-    if (!driver_.SetModifiers(modifiers))
-      return -1;
+#if defined(OS_WIN)
+    driver_.SetModifiers(modifiers);
+#endif
     keyboard_modifiers_ = modifiers;
   }
 
+  return true;
+}
+
+int MockKeyboard::GetCharacters(int key_code, std::wstring* output) const {
+#if defined(OS_WIN)
+  CHECK(output);
   // Retrieve Unicode characters associate with the key code.
   return driver_.GetCharacters(key_code, output);
 #else