Use FakeImeKeyboard when running in mash.

ui/base/ime/chromeos/ime_keyboard_ozone.cc

Index: ui/base/ime/chromeos/ime_keyboard_ozone.cc
diff --git a/ui/base/ime/chromeos/ime_keyboard_ozone.cc b/ui/base/ime/chromeos/ime_keyboard_ozone.cc
index 8aa09e08b51131b1873e101a7fc2e68be049f947..c4103951bea87a070816207fe233300b3a550fb8 100644
--- a/ui/base/ime/chromeos/ime_keyboard_ozone.cc
+++ b/ui/base/ime/chromeos/ime_keyboard_ozone.cc
@@ -4,16 +4,38 @@
 
 #include "ui/base/ime/chromeos/ime_keyboard_ozone.h"
 
+#include "base/command_line.h"
 #include "ui/ozone/public/input_controller.h"
 #include "ui/ozone/public/ozone_platform.h"
 
 namespace chromeos {
 namespace input_method {
 
-ImeKeyboardOzone::ImeKeyboardOzone(ui::InputController* input_controller)
-    : input_controller_(input_controller) {
+namespace {
+
+bool RunningInsideMash() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      "mojo-platform-channel-handle");
+}
+
+std::unique_ptr<ui::InputController> CreateStubInputControllerIfNecessary() {
+  if (RunningInsideMash())
+    return ui::CreateStubInputController();
+  return nullptr;
 }
 
+}  // namespace
+
+// TODO(kylechar/moshayedi): Revisit creating the stub InputController after
+// mus+ash IME plan exists.
+ImeKeyboardOzone::ImeKeyboardOzone()
+    : stub_controller_(CreateStubInputControllerIfNecessary()),
+      input_controller_(
+          stub_controller_
+              ? stub_controller_.get()
+              : ui::OzonePlatform::GetInstance()->GetInputController()) {
+  DCHECK(input_controller_);
+}
 
 ImeKeyboardOzone::~ImeKeyboardOzone() {
 }
@@ -65,8 +87,7 @@ bool ImeKeyboardOzone::GetAutoRepeatEnabled() {
 
 // static
 ImeKeyboard* ImeKeyboard::Create() {
-  return new ImeKeyboardOzone(
-      ui::OzonePlatform::GetInstance()->GetInputController());
+  return new ImeKeyboardOzone();

[sadrul, 2016/04/20 17:51:19]

Can we change the code that creates this? InputMethodManagerImpl() can use
chrome::IsRunningInMash() instead of having to define this function in yet
another place, and just use FakeImeKeyboard() for now.

[kylechar, 2016/04/20 18:16:27]

Yeah, that makes way more sense.

 }
 
 }  // namespace input_method