Add logic to block the use of client 3D APIs (WebGL, Pepper 3D) if context lost notifications are r…

content/public/browser/gpu_data_manager.h

Index: content/public/browser/gpu_data_manager.h
diff --git a/content/public/browser/gpu_data_manager.h b/content/public/browser/gpu_data_manager.h
index 8bcea35b0533dd707566da30ee0e1f9e2ba66d40..14b10b7d1ba52c0395911b9151993059a5f2b46b 100644
--- a/content/public/browser/gpu_data_manager.h
+++ b/content/public/browser/gpu_data_manager.h
@@ -12,6 +12,7 @@
 #include "content/public/common/gpu_switching_option.h"
 
 class FilePath;
+class GURL;
 
 namespace base {
 class ListValue;
@@ -25,6 +26,24 @@ struct GPUInfo;
 // This class is fully thread-safe.
 class GpuDataManager {
  public:
+  // Indicates the guilt level of a domain which caused a GPU reset.
+  // If a domain is 100% known to be guilty of resetting the GPU, then
+  // it will generally not cause other domains' use of 3D APIs to be
+  // blocked, unless system stability would be compromised.
+  enum DomainGuilt {
+    DOMAIN_GUILT_KNOWN,
+    DOMAIN_GUILT_UNKNOWN
+  };
+
+  // Indicates the reason that access to a given client API (like
+  // WebGL or Pepper 3D) was blocked or not. This state is distinct
+  // from blacklisting of an entire feature.
+  enum DomainBlockStatus {
+    DOMAIN_BLOCK_STATUS_BLOCKED,
+    DOMAIN_BLOCK_STATUS_ALL_DOMAINS_BLOCKED,
+    DOMAIN_BLOCK_STATUS_NOT_BLOCKED
+  };
+
   // Getter for the singleton.
   CONTENT_EXPORT static GpuDataManager* GetInstance();
 
@@ -84,6 +103,21 @@ class GpuDataManager {
   virtual void SetWindowCount(uint32 count) = 0;
   virtual uint32 GetWindowCount() const = 0;
 
+  // Maintenance of domains requiring explicit user permission before
+  // using client-facing 3D APIs (WebGL, Pepper 3D), either because
+  // the domain has caused the GPU to reset, or because too many GPU
+  // resets have been observed globally recently, and system stability
+  // might be compromised.
+  //
+  // The given URL may be a partial URL (including at least the host)
+  // or a full URL to a page.
+  virtual void BlockDomainFrom3DAPIs(const GURL& url, DomainGuilt guilt) = 0;
+  virtual DomainBlockStatus Are3DAPIsBlocked(
+      const GURL& url) const = 0;
+  virtual void UnblockDomainFrom3DAPIs(const GURL& url) = 0;
+  // Disables domain blocking. For use only in tests.
+  virtual void DisableDomainBlockingFor3DAPIsForTesting() = 0;
+
  protected:
   virtual ~GpuDataManager() {}
 };