[ozone/x11/headless] Use FakeInputMethodContextFactory to avoid crash…

…ing.

That is, after we've added ime imeplementation for Wayland, other
ozone platforms started to crash. To avoid this, use fake factory.

fixup! [ozone/x11/headless] Use FakeInputMethodContextFactory to avoid crashing.

Added condition before setting LinuxInputMethodContextFactory.

fixup! [ozone/x11/headless] Use FakeInputMethodContextFactory to avoid crashing.

It needs to skip DCHEK at InitializeInputMethodForTesting() as
LinuxInputMethodContextFactory's already set at
OzonePlatform::InitializeUI().

ui/base/ime/input_method_initializer.cc

@@ -50,11 +50,13 @@ void InitializeInputMethodForTesting() {
   if (!g_linux_input_method_context_factory_for_testing)
     g_linux_input_method_context_factory_for_testing =
         new FakeInputMethodContextFactory();
+#if !defined(USE_OZONE)
   const LinuxInputMethodContextFactory* factory =
       LinuxInputMethodContextFactory::instance();
   CHECK(!factory || factory == g_linux_input_method_context_factory_for_testing)
       << "LinuxInputMethodContextFactory was already initialized somewhere "
       << "else.";
+#endif
   LinuxInputMethodContextFactory::SetInstance(
       g_linux_input_method_context_factory_for_testing);
 #elif defined(OS_WIN)

ui/ozone/platform/headless/BUILD.gn

@@ -26,6 +26,7 @@ source_set("headless") {
     "//base",
     "//skia",
     "//ui/base",
+    "//ui/base/ime",
     "//ui/display/manager",
     "//ui/events",
     "//ui/events/ozone:events_ozone_layout",

ui/ozone/platform/headless/ozone_platform_headless.cc

@@ -8,6 +8,7 @@
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "ui/base/cursor/ozone/bitmap_cursor_factory_ozone.h"
+#include "ui/base/ime/linux/fake_input_method_context_factory.h"
 #include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
 #include "ui/events/ozone/layout/stub/stub_keyboard_layout_engine.h"
 #include "ui/events/platform/platform_event_source.h"
@@ -90,6 +91,13 @@ class OzonePlatformHeadless : public OzonePlatform {
     input_controller_ = CreateStubInputController();
     cursor_factory_ozone_ = std::make_unique<BitmapCursorFactoryOzone>();
     gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
+
+    if (LinuxInputMethodContextFactory::instance())
+      return;
+    fake_input_method_factory_ =
+        std::make_unique<FakeInputMethodContextFactory>();
+    LinuxInputMethodContextFactory::SetInstance(
+        fake_input_method_factory_.get());
   }
 
   void InitializeGPU(const InitParams& params) override {
@@ -105,6 +113,7 @@ class OzonePlatformHeadless : public OzonePlatform {
   std::unique_ptr<InputController> input_controller_;
   std::unique_ptr<GpuPlatformSupportHost> gpu_platform_support_host_;
   std::unique_ptr<OverlayManagerOzone> overlay_manager_;
+  std::unique_ptr<FakeInputMethodContextFactory> fake_input_method_factory_;
   base::FilePath file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformHeadless);

ui/ozone/platform/x11/BUILD.gn

@@ -41,6 +41,7 @@ source_set("x11") {
     "//gpu/vulkan:buildflags",
     "//skia",
     "//ui/base",
+    "//ui/base/ime",
     "//ui/base/x",
     "//ui/display/manager",
     "//ui/events",

ui/ozone/platform/x11/DEPS

@@ -1,3 +1,4 @@
 include_rules = [
   "+ui/base/x",
+  "+ui/base/ime",
 ]

ui/ozone/platform/x11/ozone_platform_x11.cc

@@ -9,6 +9,7 @@
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "ui/base/ime/linux/fake_input_method_context_factory.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/display/manager/fake_display_delegate.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
@@ -89,8 +90,13 @@ class OzonePlatformX11 : public OzonePlatform {
     input_controller_ = CreateStubInputController();
     cursor_factory_ozone_ = std::make_unique<X11CursorFactoryOzone>();
     gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
-
     TouchFactory::SetTouchDeviceListFromCommandLine();
+
+    if (LinuxInputMethodContextFactory::instance())
+      return;
+    fake_input_method_factory_ =
+        std::make_unique<FakeInputMethodContextFactory>();
+    LinuxInputMethodContextFactory::SetInstance(fake_input_method_factory_.get());
   }
 
   void InitializeGPU(const InitParams& params) override {
@@ -147,6 +153,7 @@ class OzonePlatformX11 : public OzonePlatform {
   std::unique_ptr<InputController> input_controller_;
   std::unique_ptr<X11CursorFactoryOzone> cursor_factory_ozone_;
   std::unique_ptr<GpuPlatformSupportHost> gpu_platform_support_host_;
+  std::unique_ptr<FakeInputMethodContextFactory> fake_input_method_factory_;
 
   // Objects in the GPU process.
   std::unique_ptr<X11SurfaceFactory> surface_factory_ozone_;