Collect GL_EXTENSIONS string in GPUInfo and display it in about:gpu page....

chrome/common/gpu_messages.cc

Index: chrome/common/gpu_messages.cc
===================================================================
--- chrome/common/gpu_messages.cc	(revision 72186)
+++ chrome/common/gpu_messages.cc	(working copy)
@@ -140,6 +140,7 @@
   WriteParam(m, p.gl_version_string());
   WriteParam(m, p.gl_vendor());
   WriteParam(m, p.gl_renderer());
+  WriteParam(m, p.gl_extensions());
   WriteParam(m, p.can_lose_context());
 
 #if defined(OS_WIN)
@@ -160,6 +161,7 @@
   std::string gl_version_string;
   std::string gl_vendor;
   std::string gl_renderer;
+  std::string gl_extensions;
   bool can_lose_context;
   bool ret = ReadParam(m, iter, &progress);
   ret = ret && ReadParam(m, iter, &initialization_time);
@@ -173,6 +175,7 @@
   ret = ret && ReadParam(m, iter, &gl_version_string);
   ret = ret && ReadParam(m, iter, &gl_vendor);
   ret = ret && ReadParam(m, iter, &gl_renderer);
+  ret = ret && ReadParam(m, iter, &gl_extensions);
   ret = ret && ReadParam(m, iter, &can_lose_context);
   p->SetProgress(static_cast<GPUInfo::Progress>(progress));
   if (!ret)
@@ -186,6 +189,7 @@
   p->SetGLVersionString(gl_version_string);
   p->SetGLVendor(gl_vendor);
   p->SetGLRenderer(gl_renderer);
+  p->SetGLExtensions(gl_extensions);
   p->SetCanLoseContext(can_lose_context);
 
 #if defined(OS_WIN)