Add support for more param traits in ipc fuzzer

tools/ipc_fuzzer/mutate/generate.cc

Index: tools/ipc_fuzzer/mutate/generate.cc
diff --git a/tools/ipc_fuzzer/mutate/generate.cc b/tools/ipc_fuzzer/mutate/generate.cc
index 6d8137dd2ac24c8b15925de4036af0f0d054afd6..d10c9f1e8b54c39c3955654bc154d636c129c5f2 100644
--- a/tools/ipc_fuzzer/mutate/generate.cc
+++ b/tools/ipc_fuzzer/mutate/generate.cc
@@ -1040,18 +1040,21 @@ struct GenerateTraits<content::SyntheticGesturePacket> {
 template <>
 struct GenerateTraits<content::WebCursor> {
   static bool Generate(content::WebCursor* p, Generator* generator) {
-    blink::WebCursorInfo::Type type;
-    if (!GenerateParam(&type, generator))
-      return false;
-    content::WebCursor::CursorInfo info(type);
+    content::WebCursor::CursorInfo info;
 
-    // Omitting |externalHandle| since it is not serialized.
+    info.type = (blink::WebCursorInfo::Type)(RandInRange(44));

[Martin Barbella, 2015/02/18 20:08:02]

Can we use the last type + 1 here instead of this? It's probably also worth
investigating or at least leaving a TODO to see if we can define this properly
using the IPC_ENUM_TRAITS_MAX_VALUE macro so that we don't need this hack.

[Tom Sepez, 2015/02/18 20:17:11]

We'd like to stick out-of-range values here, too.

     if (!GenerateParam(&info.hotspot, generator))
       return false;
     if (!GenerateParam(&info.image_scale_factor, generator))
       return false;
     if (!GenerateParam(&info.custom_image, generator))
       return false;
+    // Omitting |externalHandle| since it is not serialized.
+
+    // Scale factor is expected to be greater than 0, otherwise we hit
+    // a check failure.
+    info.image_scale_factor = fabs(info.image_scale_factor) + 0.001;
+
     *p = content::WebCursor(info);
     return true;
   }
@@ -1290,6 +1293,16 @@ struct GenerateTraits<GURL> {
   }
 };
 
+#if defined(OS_WIN)
+template <>
+struct GenerateTraits<HWND> {
+  static bool Generate(HWND* p, Generator* generator) {
+    // TODO(aarya): This should actually generate something.
+    return true;
+  }
+};
+#endif
+
 template <>
 struct GenerateTraits<IPC::Message> {
   static bool Generate(IPC::Message *p, Generator* generator) {
@@ -1330,6 +1343,16 @@ struct GenerateTraits<IPC::ChannelHandle> {
   }
 };
 
+#if defined(OS_WIN)
+template <>
+struct GenerateTraits<LOGFONT> {
+  static bool Generate(LOGFONT* p, Generator* generator) {
+    // TODO(aarya): This should actually generate something.
+    return true;
+  }
+};
+#endif
+
 template <>
 struct GenerateTraits<media::AudioParameters> {
   static bool Generate(media::AudioParameters* p, Generator* generator) {