Add TRACE calls for all gpu driver calls

ui/gl/generate_bindings.py

Index: ui/gl/generate_bindings.py
diff --git a/ui/gl/generate_bindings.py b/ui/gl/generate_bindings.py
index d8e6866d9be8cefa2f5936fe2d54bf9d88122f84..8818c87fa32721e35fbb74b5c02d88271aa0272d 100755
--- a/ui/gl/generate_bindings.py
+++ b/ui/gl/generate_bindings.py
@@ -1347,6 +1347,7 @@ def GenerateSource(file, functions, set_name, used_extension_functions):
 // This file is automatically generated.
 
 #include <string>
+#include "base/debug/trace_event.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
@@ -1510,7 +1511,7 @@ namespace gfx {
 }
 """ % set_name.upper())
 
-  # Write RealGLApi functions
+  # Write GLApiBase functions
   for func in functions:
     names = func['names']
     return_type = func['return_type']
@@ -1533,6 +1534,30 @@ namespace gfx {
           (function_name, argument_names))
     file.write('}\n')
 
+  # Write TraceGLApi functions
+  for func in functions:
+    names = func['names']
+    return_type = func['return_type']
+    arguments = func['arguments']
+    file.write('\n')
+    file.write('%s Trace%sApi::%sFn(%s) {\n' %
+        (return_type, set_name.upper(), names[0], arguments))
+    argument_names = re.sub(
+        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', arguments)
+    argument_names = re.sub(
+        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', argument_names)
+    if argument_names == 'void' or argument_names == '':
+      argument_names = ''
+    function_name = names[0]
+    file.write('  TRACE_EVENT0("gpu", "TraceGLAPI::%s")\n' % function_name)
+    if return_type == 'void':
+      file.write('  %s_api_->%sFn(%s);\n' %
+          (set_name.lower(), function_name, argument_names))
+    else:
+      file.write('  return %s_api_->%sFn(%s);\n' %
+          (set_name.lower(), function_name, argument_names))
+    file.write('}\n')
+
   file.write('\n')
   file.write('}  // namespace gfx\n')