add classes trace_analyzer::Query and TraceAnalyzer to make it easy to search through trace data

base/debug/trace_event.cc

 // Copyright (c) 2011 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 <algorithm>
 
 #if defined(OS_WIN)
 #include "base/debug/trace_event_win.h"
@@ skipping 100 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // TraceEvent
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 namespace {
 
-const char* GetPhaseStr(TraceEventPhase phase) {
-  switch(phase) {
-    case TRACE_EVENT_PHASE_BEGIN:
-      return "B";
-    case TRACE_EVENT_PHASE_INSTANT:
-      return "I";
-    case TRACE_EVENT_PHASE_END:
-      return "E";
-    case TRACE_EVENT_PHASE_METADATA:
-      return "M";
-    default:
-      NOTREACHED() << "Invalid phase argument";
-      return "?";
-  }
-}
-
 size_t GetAllocLength(const char* str) { return str ? strlen(str) + 1 : 0; }
 
 // Copies |*member| into |*buffer|, sets |*member| to point to this new
 // location, and then advances |*buffer| by the amount written.
 void CopyTraceEventParameter(char** buffer,
                              const char** member,
                              const char* end) {
   if (*member) {
     size_t written = strlcpy(*buffer, *member, end - *buffer) + 1;
     DCHECK_LE(static_cast<int>(written), end - *buffer);
@@ skipping 66 matching lines @@
       CopyTraceEventParameter(&ptr, arg_values_[0].as_assignable_string(), end);
     if (arg2_is_copy)
       CopyTraceEventParameter(&ptr, arg_values_[1].as_assignable_string(), end);
     DCHECK_EQ(end, ptr) << "Overrun by " << ptr - end;
   }
 }
 
 TraceEvent::~TraceEvent() {
 }
 
+const char* TraceEvent::GetPhaseStr(TraceEventPhase phase) {
+  switch(phase) {
+    case TRACE_EVENT_PHASE_BEGIN:
+      return "B";
+    case TRACE_EVENT_PHASE_INSTANT:
+      return "I";
+    case TRACE_EVENT_PHASE_END:
+      return "E";
+    case TRACE_EVENT_PHASE_METADATA:
+      return "M";
+    default:
+      NOTREACHED() << "Invalid phase argument";
+      return "?";
+  }
+}
+
+TraceEventPhase TraceEvent::GetPhase(const char* phase) {
+  switch(*phase) {
+    case 'B':
+      return TRACE_EVENT_PHASE_BEGIN;
+    case 'I':
+      return TRACE_EVENT_PHASE_INSTANT;
+    case 'E':
+      return TRACE_EVENT_PHASE_END;
+    case 'M':
+      return TRACE_EVENT_PHASE_METADATA;
+    default:
+      NOTREACHED() << "Invalid phase name";
+      return TRACE_EVENT_PHASE_METADATA;
+  }
+}
+
 void TraceEvent::AppendEventsAsJSON(const std::vector<TraceEvent>& events,
                                     size_t start,
                                     size_t count,
                                     std::string* out) {
   *out += "[";
   for (size_t i = 0; i < count && start + i < events.size(); ++i) {
     if (i > 0)
       *out += ",";
     events[i + start].AppendAsJSON(out);
   }
@@ skipping 377 matching lines @@
         NULL, 0, NULL, 0,
         p_data_->threshold_begin_id, p_data_->threshold,
         TraceLog::EVENT_FLAG_NONE);
   }
 }
 
 }  // namespace internal
 
 }  // namespace debug
 }  // namespace base