renaming setJavaClass_ANPSetValue and ensuring memory is freed on subsequent calls

Change-Id: I7881e711af7ec905e5c120e8e2fd4b0b7ba5e840

3 files changed, 25 insertions, 6 deletions

diff --git a/WebKit/android/plugins/PluginWidgetAndroid.cpp b/WebKit/android/plugins/PluginWidgetAndroid.cpp
index 6318276..81e9650 100644
--- a/WebKit/android/plugins/PluginWidgetAndroid.cpp
+++ b/WebKit/android/plugins/PluginWidgetAndroid.cpp
@@ -125,7 +125,19 @@ void PluginWidgetAndroid::setWindow(NPWindow* window, bool isTransparent) {
     }
 }
 
-bool PluginWidgetAndroid::setJavaClassName(const char* className) {
+bool PluginWidgetAndroid::setPluginStubJavaClassName(const char* className) {
+
+    if (m_javaClassName) {
+        free(m_javaClassName);
+    }
+
+    // don't call strdup() if the className is to be set to NULL
+    if (!className) {
+        m_javaClassName = NULL;
+        return true;
+    }
+
+    // make a local copy of the className
     m_javaClassName = strdup(className);
     return (m_javaClassName != NULL);
 }
diff --git a/WebKit/android/plugins/PluginWidgetAndroid.h b/WebKit/android/plugins/PluginWidgetAndroid.h
index af77aa9..aaf6f96 100644
--- a/WebKit/android/plugins/PluginWidgetAndroid.h
+++ b/WebKit/android/plugins/PluginWidgetAndroid.h
@@ -68,9 +68,10 @@ struct PluginWidgetAndroid {
     void setWindow(NPWindow* window, bool isTransparent);
 
     /* Called to notify us of the plugin's java class that implements the
-     * PluginStub interface.
+     * PluginStub interface. A local copy is made of the className so the caller
+     * can safely free the memory as soon as the function returns.
      */
-    bool setJavaClassName(const char* className);
+    bool setPluginStubJavaClassName(const char* className);
 
     /*  Called whenever the plugin itself requests a new drawing model. If the
         hardware does not support the requested model then false is returned,
diff --git a/WebKit/android/plugins/android_npapi.h b/WebKit/android/plugins/android_npapi.h
index 6688d00..5218031 100644
--- a/WebKit/android/plugins/android_npapi.h
+++ b/WebKit/android/plugins/android_npapi.h
@@ -139,11 +139,17 @@ typedef uint32_t ANPMatrixFlag;
 
 /** Set the name of the Java class found in the plugin's apk that implements the
     PluginStub interface.  The value provided must be a null terminated char*
-    that contains the fully qualified class name (e.g., your.package.className)
+    that contains the fully qualified class name (e.g., your.package.className).
+    A local copy is made of the char* so the caller can safely free the memory
+    as soon as the function returns.
 
-    NPN_SetValue(inst, kSetJavaClassName_ANPSetValue, (void*)nullTerminatedChar*)
+    This value must be set prior to selecting the Surface_ANPDrawingModel or
+    requesting to enter full-screen mode.
+
+    NPN_SetValue(inst, kSetPluginStubJavaClassName_ANPSetValue,
+                (void*)nullTerminatedChar*)
  */
-#define kSetJavaClassName_ANPSetValue       ((NPPVariable)1001)
+#define kSetPluginStubJavaClassName_ANPSetValue ((NPPVariable)1001)
 
 /** These are used as bitfields in ANPSupportedDrawingModels_EnumValue,
     and as-is in ANPRequestDrawingModel_EnumValue. The drawing model determines