Add GPU memory tab to the task manager.

content/public/common/gpu_info.h

Index: content/public/common/gpu_info.h
diff --git a/content/public/common/gpu_info.h b/content/public/common/gpu_info.h
index 5a01e182482e5c410dc554cd0a86ef670e8b4818..afea3a7b0ea488738e0f30570f9c6ae7e05b0bed 100644
--- a/content/public/common/gpu_info.h
+++ b/content/public/common/gpu_info.h
@@ -8,10 +8,12 @@
 // Provides access to the GPU information for the system
 // on which chrome is currently running.
 
+#include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/process.h"
 #include "base/time.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
@@ -110,6 +112,27 @@ struct CONTENT_EXPORT GPUInfo {
 #endif
 };
 
+struct CONTENT_EXPORT GPUVidmemUsageStats {
+  GPUVidmemUsageStats();
+  ~GPUVidmemUsageStats();
+  struct CONTENT_EXPORT GPUProcessVidmemUsageStats {
+    GPUProcessVidmemUsageStats();
+    ~GPUProcessVidmemUsageStats();
+
+    // The bytes of GPU resources accessible by this process
+    size_t vidmem;
+
+    // Set to true if this process' GPU resource count is inflated because
+    // it is counting other processes' resources (e.g, the GPU process has
+    // duplicate set to true because it is the aggregate of all processes)
+    bool has_duplicates;
+  };
+  typedef std::map<base::ProcessId,GPUProcessVidmemUsageStats> ProcessMap;
+
+  // A map of processes to their GPU resource consumption
+  ProcessMap process_map;
+};
+
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_GPU_INFO_H_