Implements part of Device Motion in the Renderer

content/browser/device_orientation/provider.h

Index: content/browser/device_orientation/provider.h
diff --git a/content/browser/device_orientation/provider.h b/content/browser/device_orientation/provider.h
index 39ec86007db1ff891627086b72caa1e9fa8a463f..208100da17896ae1e82d956a8962b81110d5da0e 100644
--- a/content/browser/device_orientation/provider.h
+++ b/content/browser/device_orientation/provider.h
@@ -10,11 +10,22 @@
 
 namespace device_orientation {
 
+class Motion;
 class Orientation;
 
 class CONTENT_EXPORT Provider : public base::RefCountedThreadSafe<Provider> {
  public:
-  class Observer {
+  // TODO(aousterh): refactor this so that there is only one type of observer
+  // that can handle multiple types of data (motion, orientation, etc.)
+  class MotionObserver {
+   public:
+    virtual void OnMotionUpdate(const Motion& motion) = 0;
+
+   protected:
+    virtual ~MotionObserver() {}
+  };
+
+  class OrientationObserver {

[Steve Block, 2012/07/04 13:58:24]

You might want to do the Oberver -> OrientationObserver rename as a separate
prerequisite change to reduce the size of this diff.

    public:
     // Called when the orientation changes.
     // An Observer must not synchronously call Provider::RemoveObserver
@@ -22,7 +33,7 @@ class CONTENT_EXPORT Provider : public base::RefCountedThreadSafe<Provider> {
     virtual void OnOrientationUpdate(const Orientation& orientation) = 0;
 
    protected:
-    virtual ~Observer() {}
+    virtual ~OrientationObserver() {}
   };
 
   // Returns a pointer to the singleton instance of this class.
@@ -39,10 +50,13 @@ class CONTENT_EXPORT Provider : public base::RefCountedThreadSafe<Provider> {
   // Get the current instance. Used for testing.
   static Provider* GetInstanceForTests();
 
-  // Note: AddObserver may call back synchronously to the observer with
-  // orientation data.
-  virtual void AddObserver(Observer* observer) = 0;
-  virtual void RemoveObserver(Observer* observer) = 0;
+  // Note: AddMotionObserver and AddOrientationObserver may call back
+  // synchronously to the observer with data.
+  virtual void AddMotionObserver(MotionObserver* observer) = 0;
+  virtual void AddOrientationObserver(OrientationObserver* observer) = 0;
+
+  virtual void RemoveMotionObserver(MotionObserver* observer) = 0;
+  virtual void RemoveOrientationObserver(OrientationObserver* observer) = 0;
 
  protected:
   Provider();