Add proper support for fixed position elements

this is two-part change, see  http://android-git.corp.google.com/g/#change,37092 for the java counterpart.
This CL implements fixed position elements (css position: fixed) using layers, supporting pixels and percent lengths.

It addresses http://b/1914365

1 files changed, 4 insertions, 3 deletions

diff --git a/WebKit/android/nav/WebView.cpp b/WebKit/android/nav/WebView.cpp
index 0426337..1c98b87 100644
--- a/WebKit/android/nav/WebView.cpp
+++ b/WebKit/android/nav/WebView.cpp
@@ -1575,7 +1575,8 @@ static void nativeDrawMatches(JNIEnv *env, jobject obj, jobject canv)
 }
 
 static void nativeDrawLayers(JNIEnv *env, jobject obj,
-    jint layer, jfloat scrollX, jfloat scrollY,
+    jint layer, jint scrollX, jint scrollY,
+    jint width, jint height,
     jfloat scale, jobject canv)
 {
     if (!env)
@@ -1589,7 +1590,7 @@ static void nativeDrawLayers(JNIEnv *env, jobject obj,
     LayerAndroid* layerImpl = reinterpret_cast<LayerAndroid*>(layer);
     SkCanvas* canvas = GraphicsJNI::getNativeCanvas(env, canv);
     if (canvas)
-        layerImpl->paintOn(scrollX, scrollY, scale, canvas);
+        layerImpl->paintOn(scrollX, scrollY, width, height, scale, canvas);
 #endif
 }
 
@@ -2193,7 +2194,7 @@ static JNINativeMethod gJavaWebViewMethods[] = {
         (void*) nativeLayersHaveAnimations },
     { "nativeEvaluateLayersAnimations", "(I)I",
         (void*) nativeEvaluateLayersAnimations },
-    { "nativeDrawLayers", "(IFFFLandroid/graphics/Canvas;)V",
+    { "nativeDrawLayers", "(IIIIIFLandroid/graphics/Canvas;)V",
         (void*) nativeDrawLayers },
     { "nativeUpdateLayers", "(II)V",
         (void*) nativeUpdateLayers },