[DevTools] Add stub handlers for synthetic gesture commands.

content/browser/devtools/protocol/input_handler.cc

Index: content/browser/devtools/protocol/input_handler.cc
diff --git a/content/browser/devtools/protocol/input_handler.cc b/content/browser/devtools/protocol/input_handler.cc
index 05cff6195a1f7bfba9a53802410c89a60069e45e..5258871721806f81bc9228ea4a8bf5c9f1bc2f78 100644
--- a/content/browser/devtools/protocol/input_handler.cc
+++ b/content/browser/devtools/protocol/input_handler.cc
@@ -25,6 +25,9 @@ void InputHandler::SetRenderViewHost(RenderViewHostImpl* host) {
   host_ = host;
 }
 
+void InputHandler::SetClient(scoped_ptr<Client> client) {
+}
+
 Response InputHandler::EmulateTouchFromMouseEvent(const std::string& type,
                                                   int x,
                                                   int y,
@@ -106,6 +109,40 @@ Response InputHandler::EmulateTouchFromMouseEvent(const std::string& type,
   return Response::OK();
 }
 
+Response InputHandler::SynthesizePinchGesture(
+    DevToolsCommandId command_id,
+    int x,
+    int y,
+    double scale_factor,
+    const int* relative_speed,
+    const std::string* gesture_source_type) {
+  return Response::InternalError("Not yet implemented");
+}
+
+Response InputHandler::SynthesizeScrollGesture(
+    DevToolsCommandId command_id,
+    int x,
+    int y,
+    const int* xdistance,
+    const int* ydistance,
+    const int* xoverscroll,
+    const int* yoverscroll,
+    const bool* prevent_fling,
+    const int* speed,
+    const std::string* gesture_source_type) {
+  return Response::InternalError("Not yet implemented");
+}
+
+Response InputHandler::SynthesizeTapGesture(
+    DevToolsCommandId command_id,
+    int x,
+    int y,
+    const int* duration,
+    const int* tap_count,
+    const std::string* gesture_source_type) {
+  return Response::InternalError("Not yet implemented");
+}
+
 }  // namespace input
 }  // namespace devtools
 }  // namespace content