Merge gpu_trace_event back into base/debug/trace_event.

Initial land attempt at http://codereview.chromium.org/6551019/
gpu_trace_event fork at http://codereview.chromium.org/6691013

- gpu_trace_event renamed to base/debug/trace_event and modified as appropriate for base::debug
- Unit Tests implemented for trace_event
- gpu_common library removed (was added only for gpu_trace_event)
- Existing calls to trace_event suffixed with _ETW to make ETW calls (see decisions and incremental plans at end of 6551019)
- GPU trace calls renamed to new calls.
- Tracing switch removed from test_shell, as linux log file support removed.

BUG=79509
TEST=trace_event_win_unittest and about:gpu

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=84284

Review URL: http://codereview.chromium.org/6862002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@84486 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 18 insertions, 11 deletions

diff --git a/content/browser/trace_controller.cc b/content/browser/trace_controller.cc
index 5bf2efa..f04f4b2 100644
--- a/content/browser/trace_controller.cc
+++ b/content/browser/trace_controller.cc
@@ -4,11 +4,12 @@
 
 #include "content/browser/trace_controller.h"
 
+#include "base/bind.h"
+#include "base/debug/trace_event.h"
 #include "base/task.h"
 #include "content/browser/browser_message_filter.h"
 #include "content/browser/trace_message_filter.h"
 #include "content/common/child_process_messages.h"
-#include "gpu/common/gpu_trace_event.h"
 
 
 TraceController::TraceController() :
@@ -17,12 +18,14 @@ TraceController::TraceController() :
     pending_bpf_ack_count_(0),
     maximum_bpf_(0.0f),
     is_tracing_(false) {
-  gpu::TraceLog::GetInstance()->SetOutputCallback(
-      NewCallback(this, &TraceController::OnTraceDataCollected));
+  base::debug::TraceLog::GetInstance()->SetOutputCallback(
+      base::Bind(&TraceController::OnTraceDataCollected,
+                 base::Unretained(this)));
 }
 
 TraceController::~TraceController() {
-  gpu::TraceLog::GetInstance()->SetOutputCallback(NULL);
+  if (base::debug::TraceLog* trace_log = base::debug::TraceLog::GetInstance())
+    trace_log->SetOutputCallback(base::debug::TraceLog::OutputCallback());
 }
 
 //static
@@ -41,7 +44,7 @@ bool TraceController::BeginTracing(TraceSubscriber* subscriber) {
 
   // Enable tracing
   is_tracing_ = true;
-  gpu::TraceLog::GetInstance()->SetEnabled(true);
+  base::debug::TraceLog::GetInstance()->SetEnabled(true);
 
   // Notify all child processes.
   for (FilterMap::iterator it = filters_.begin(); it != filters_.end(); ++it) {
@@ -92,7 +95,7 @@ bool TraceController::GetTraceBufferPercentFullAsync(
   // Handle special case of zero child processes.
   if (pending_bpf_ack_count_ == 1) {
     // Ack asynchronously now, because we don't have any children to wait for.
-    float bpf = gpu::TraceLog::GetInstance()->GetBufferPercentFull();
+    float bpf = base::debug::TraceLog::GetInstance()->GetBufferPercentFull();
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
         NewRunnableMethod(this,
                           &TraceController::OnTraceBufferPercentFullReply,
@@ -161,7 +164,7 @@ void TraceController::OnEndTracingAck() {
     // called with the last of the local trace data. Since we are on the UI
     // thread, the call to OnTraceDataCollected will be synchronous, so we can
     // immediately call OnEndTracingComplete below.
-    gpu::TraceLog::GetInstance()->SetEnabled(false);
+    base::debug::TraceLog::GetInstance()->SetEnabled(false);
 
     // Trigger callback if one is set.
     if (subscriber_) {
@@ -179,17 +182,21 @@ void TraceController::OnEndTracingAck() {
   }
 }
 
-void TraceController::OnTraceDataCollected(const std::string& data) {
+void TraceController::OnTraceDataCollected(
+    const scoped_refptr<base::debug::TraceLog::RefCountedString>&
+        json_events_str_ptr) {
   // OnTraceDataCollected may be called from any browser thread, either by the
   // local event trace system or from child processes via TraceMessageFilter.
   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-        NewRunnableMethod(this, &TraceController::OnTraceDataCollected, data));
+        NewRunnableMethod(this,
+                          &TraceController::OnTraceDataCollected,
+                          json_events_str_ptr));
     return;
   }
 
   if (subscriber_)
-    subscriber_->OnTraceDataCollected(data);
+    subscriber_->OnTraceDataCollected(json_events_str_ptr->data);
 }
 
 void TraceController::OnTraceBufferFull() {
@@ -229,7 +236,7 @@ void TraceController::OnTraceBufferPercentFullReply(float percent_full) {
   if (pending_bpf_ack_count_ == 1) {
     // The last ack represents local trace, so we need to ack it now. Note that
     // this code only executes if there were child processes.
-    float bpf = gpu::TraceLog::GetInstance()->GetBufferPercentFull();
+    float bpf = base::debug::TraceLog::GetInstance()->GetBufferPercentFull();
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
         NewRunnableMethod(this,
                           &TraceController::OnTraceBufferPercentFullReply,