Added/Updated system.cpu /w docs

chrome/chrome.d.ts

@@ -6061,6 +6061,51 @@ declare module chrome.socket {
 	export function getNetworkList(callback: (result: NetworkInterface[]) => void): void;
 }
 
+////////////////////
+// System CPU
+////////////////////
+/**
+ * Use the system.cpu API to query CPU metadata.
+ * Permissions: "system.cpu"    
+ * @since Chrome 32.
+ */
+declare module chrome.system.cpu {
+	interface ProcessorUsage {
+		/** The cumulative time used by userspace programs on this processor. */
+		user: number;
+		/** The cumulative time used by kernel programs on this processor. */
+		kernel: number;
+		/** The cumulative time spent idle by this processor. */
+		idle: number;
+		/** The total cumulative time for this processor. This value is equal to user + kernel + idle. */
+		total: number;
+	}
+	
+	interface ProcessorInfo {
+		/** Cumulative usage info for this logical processor. */
+		usage: ProcessorUsage;
+	}
+	
+	interface CpuInfo {
+		/** The number of logical processors. */
+		numOfProcessors: number;
+		/** The architecture name of the processors. */
+		archName: string;
+		/** The model name of the processors. */
+		modelName: string;
+		/** 
+		 * A set of feature codes indicating some of the processor's capabilities. 
+		 * The currently supported codes are "mmx", "sse", "sse2", "sse3", "ssse3", "sse4_1", "sse4_2", and "avx". 
+		 */
+		features: string[];
+		/** Information about each logical processor. */
+		processors: ProcessorInfo[];
+	}
+	
+	/** Queries basic CPU information of the system. */
+	export function getInfo(callback: (info: CpuInfo) => void): void;
+}
+
 ////////////////////
 // TabCapture
 ////////////////////