mandoline: Fix character entry in html_viewer on Linux.

mandoline/ui/aura/window_tree_host_mojo.cc

Index: mandoline/ui/aura/window_tree_host_mojo.cc
diff --git a/mandoline/ui/aura/window_tree_host_mojo.cc b/mandoline/ui/aura/window_tree_host_mojo.cc
index aea5cb253c92317420bfb9fd0d87adc5a80d3c95..d6c815c990b8ffdfaa6a3786392969fc4854cbce 100644
--- a/mandoline/ui/aura/window_tree_host_mojo.cc
+++ b/mandoline/ui/aura/window_tree_host_mojo.cc
@@ -5,6 +5,7 @@
 #include "mandoline/ui/aura/window_tree_host_mojo.h"
 
 #include "components/view_manager/public/cpp/view_manager.h"
+#include "mandoline/ui/aura/input_method_mandoline.h"
 #include "mandoline/ui/aura/surface_context_factory.h"
 #include "mojo/application/public/interfaces/shell.mojom.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
@@ -33,6 +34,15 @@ WindowTreeHostMojo::WindowTreeHostMojo(mojo::Shell* shell, mojo::View* view)
   CreateCompositor(GetAcceleratedWidget());
   aura::Env::GetInstance()->set_context_factory(default_context_factory);
   DCHECK_EQ(context_factory_.get(), compositor()->context_factory());
+
+#if defined(OS_LINUX) && !defined(OS_ANDROID)
+  // We override the input method on Linux. InputMethodAuraLinux was designed
+  // to work on a stream of raw X11 events. However, we're now standardizing on
+  // the Windows event model here. Trying to use InputMethodAuraLinux on a
+  // Windows-like event stream leads to double character events.
+  input_method_.reset(new InputMethodMandoline(this));
+  SetSharedInputMethod(input_method_.get());

[Shu Chen, 2015/07/17 01:54:08]

Please notice that my refactoring cl
https://codereview.chromium.org/1236923003/diff/60001/ui/aura/window_tree_hos...
will avoid dispatching key events to input method in aura::WindowTreeHost.
Instead, the subclass'es of aura::WindowTreeHost needs to take care of it.

+#endif
 }
 
 WindowTreeHostMojo::~WindowTreeHostMojo() {