1 files changed, 55 insertions, 0 deletions
diff --git a/libchrome_tools/patches/libchrome-Introduce-stub-ConvertableToTraceFormat.patch b/libchrome_tools/patches/libchrome-Introduce-stub-ConvertableToTraceFormat.patch
new file mode 100644
index 0000000000..bd68077cc7
--- /dev/null
+++ b/libchrome_tools/patches/libchrome-Introduce-stub-ConvertableToTraceFormat.patch
@@ -0,0 +1,55 @@
+From f2d560ab2808c87cd60a2962037bf4dabd9781ef Mon Sep 17 00:00:00 2001
+From: Hidehiko Abe <hidehiko@chromium.org>
+Date: Fri, 14 Jun 2019 14:22:33 +0900
+Subject: [PATCH] libchrome: Introduce stub ConvertableToTraceFormat.
+
+BUG=chromium:909719
+TEST=Built locally.
+
+Change-Id: I5c849edc2c5e8370bff6a8b1b83a92e5ef5836c8
+---
+ base/trace_event/trace_event.h | 13 ++++++++++++-
+ 1 file changed, 12 insertions(+), 1 deletion(-)
+
+diff --git a/base/trace_event/trace_event.h b/base/trace_event/trace_event.h
+index 1ce76d9..7385582 100644
+--- a/base/trace_event/trace_event.h
++++ b/base/trace_event/trace_event.h
+@@ -10,6 +10,9 @@
+ #include "base/trace_event/common/trace_event_common.h"
+ #include "base/trace_event/heap_profiler.h"
+ 
++// Indirectly included.
++#include "base/strings/string_util.h"
++
+ // To avoid -Wunused-* errors, eat expression by macro.
+ namespace libchrome_internal {
+ template <typename... Args> void Ignore(Args&&... args) {}
+@@ -18,8 +21,9 @@ template <typename... Args> void Ignore(Args&&... args) {}
+   (false ? libchrome_internal::Ignore(__VA_ARGS__) : (void) 0)
+ 
+ // Body is effectively empty.
++#define INTERNAL_TRACE_EVENT_ADD(...) INTERNAL_IGNORE(__VA_ARGS__)
+ #define INTERNAL_TRACE_EVENT_ADD_SCOPED(...) INTERNAL_IGNORE(__VA_ARGS__)
+-#define INTERNAL_TRACE_TASK_EXECUTION(...)
++#define INTERNAL_TRACE_TASK_EXECUTION(...) INTERNAL_IGNORE(__VA_ARGS__)
+ #define INTERNAL_TRACE_EVENT_ADD_SCOPED_WITH_FLOW(...) \
+   INTERNAL_IGNORE(__VA_ARGS__)
+ #define TRACE_ID_MANGLE(val) (val)
+@@ -38,6 +42,13 @@ class TraceLog {
+   void SetCurrentThreadBlocksMessageLoop() {}
+ };
+ 
++class BASE_EXPORT ConvertableToTraceFormat {
++ public:
++  ConvertableToTraceFormat() = default;
++  virtual ~ConvertableToTraceFormat() = default;
++  virtual void AppendAsTraceFormat(std::string* out) const {};
++};
++
+ }  // namespace trace_event
+ }  // namespace base
+ #else
+-- 
+2.22.0.410.gd8fdbe21b5-goog
+