Enhance GPU blacklist so we can also blacklist GPUs other than the primary one.

chrome/browser/gpu_blacklist.h

Index: chrome/browser/gpu_blacklist.h
===================================================================
--- chrome/browser/gpu_blacklist.h	(revision 148446)
+++ chrome/browser/gpu_blacklist.h	(working copy)
@@ -272,6 +272,13 @@
       kMultiGpuStyleNone
     };
 
+    enum MultiGpuCategory {
+      kMultiGpuCategoryPrimary,
+      kMultiGpuCategorySecondary,
+      kMultiGpuCategoryAny,
+      kMultiGpuCategoryNone
+    };
+
     GpuBlacklistEntry();
     ~GpuBlacklistEntry() { }
 
@@ -290,6 +297,8 @@
 
     bool SetMultiGpuStyle(const std::string& multi_gpu_style_string);
 
+    bool SetMultiGpuCategory(const std::string& multi_gpu_category_string);
+
     bool SetDriverVendorInfo(const std::string& vendor_op,
                              const std::string& vendor_value);
 
@@ -327,6 +336,9 @@
 
     static MultiGpuStyle StringToMultiGpuStyle(const std::string& style);
 
+    static MultiGpuCategory StringToMultiGpuCategory(
+        const std::string& category);
+
     uint32 id_;
     bool disabled_;
     std::string description_;
@@ -336,6 +348,7 @@
     uint32 vendor_id_;
     std::vector<uint32> device_id_list_;
     MultiGpuStyle multi_gpu_style_;
+    MultiGpuCategory multi_gpu_category_;
     scoped_ptr<StringInfo> driver_vendor_info_;
     scoped_ptr<VersionInfo> driver_version_info_;
     scoped_ptr<VersionInfo> driver_date_info_;