Add plumbing for testing API for MockWebDeviceMotionHandler injection.

webkit/support/test_webkit_platform_support.cc

Index: webkit/support/test_webkit_platform_support.cc
diff --git a/webkit/support/test_webkit_platform_support.cc b/webkit/support/test_webkit_platform_support.cc
index 84e4cd5ef276581ad2e18807488311219a94123e..841b8034adf8154bd99cb3a8de3e23e2c7436752 100644
--- a/webkit/support/test_webkit_platform_support.cc
+++ b/webkit/support/test_webkit_platform_support.cc
@@ -72,7 +72,8 @@ TestWebKitPlatformSupport::TestWebKitPlatformSupport(bool unit_test_mode,
     WebKit::Platform* shadow_platform_delegate)
     : unit_test_mode_(unit_test_mode),
       shadow_platform_delegate_(shadow_platform_delegate),
-      threaded_compositing_enabled_(false) {
+      threaded_compositing_enabled_(false),
+      device_motion_listener_(0) {
   v8::V8::SetCounterFunction(base::StatsTable::FindLocation);
 
   WebKit::initialize(this);
@@ -457,6 +458,11 @@ void TestWebKitPlatformSupport::setGamepadData(
   gamepad_data_ = data;
 }
 
+void TestWebKitPlatformSupport::setDeviceMotionListener(
+    WebKit::WebDeviceMotionListener* listener) {
+  device_motion_listener_ = listener;
+}
+
 void TestWebKitPlatformSupport::GetPlugins(
     bool refresh, std::vector<webkit::WebPluginInfo>* plugins) {
   if (refresh)