Remove gpu side LatencyInfo merging

ui/events/latency_info.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/debug/trace_event.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "ui/events/latency_info.h"
 
 #include <algorithm>
 
 namespace {
+
+const unsigned int kMaxLatencyInfoNumber = 100;
+
 const char* GetComponentName(ui::LatencyComponentType type) {
 #define CASE_TYPE(t) case ui::t:  return #t
   switch (type) {
     CASE_TYPE(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT);
     CASE_TYPE(INPUT_EVENT_LATENCY_SCROLL_UPDATE_RWH_COMPONENT);
     CASE_TYPE(INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT);
     CASE_TYPE(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT);
     CASE_TYPE(INPUT_EVENT_LATENCY_UI_COMPONENT);
     CASE_TYPE(INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT);
     CASE_TYPE(INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT);
@@ skipping 88 matching lines @@
 }  // namespace
 
 namespace ui {
 
 LatencyInfo::LatencyInfo() : trace_id(-1), terminated(false) {
 }
 
 LatencyInfo::~LatencyInfo() {
 }
 
+bool LatencyInfo::Verify(const std::vector<LatencyInfo>& latency_info,
+                         const char* referring_msg) {
+  if (latency_info.size() > kMaxLatencyInfoNumber) {
+    LOG(ERROR) << referring_msg << ", LatencyInfo vector size "
+               << latency_info.size() << " is too big.";
+    return false;
+  }
+  return true;
+}
+
 void LatencyInfo::MergeWith(const LatencyInfo& other) {
   for (LatencyMap::const_iterator it = other.latency_components.begin();
        it != other.latency_components.end();
        ++it) {
     AddLatencyNumberWithTimestamp(it->first.first,
                                   it->first.second,
                                   it->second.sequence_number,
                                   it->second.event_time,
                                   it->second.event_count,
                                   false);
@@ skipping 97 matching lines @@
 }
 
 void LatencyInfo::TraceEventType(const char* event_type) {
   TRACE_EVENT_ASYNC_STEP_INTO0("benchmark",
                                "InputLatency",
                                TRACE_ID_DONT_MANGLE(trace_id),
                                event_type);
 }
 
 }  // namespace ui