Support InputMethodManager#updateCursorAnchorInfo for Android 5.0 (C++ version)

content/public/android/java/src/org/chromium/content/browser/ContentViewCore.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser;
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.SearchManager;
 import android.content.ClipboardManager;
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     private int mViewportWidthPix;
     private int mViewportHeightPix;
     private int mPhysicalBackingWidthPix;
     private int mPhysicalBackingHeightPix;
     private int mTopControlsHeightPix;
     private boolean mTopControlsShrinkBlinkSize;
 
     // Cached copy of all positions and scales as reported by the renderer.
     private final RenderCoordinates mRenderCoordinates;
 
+    // Buffer to receive return value from View#getLocationOnScreen(int[]).
+    private final int[] mGetLocationOnScreenBuffer = new int[2];
+
     // Tracks whether a selection is currently active.  When applied to selected text, indicates
     // whether the last selected text is still highlighted.
     private boolean mHasSelection;
     private boolean mHasInsertion;
     private String mLastSelectedText;
     private boolean mFocusedNodeEditable;
     private ActionMode mActionMode;
     private boolean mUnselectAllOnActionModeDismiss;
     private boolean mPreserveSelectionOnNextLossOfFocus;
     private SelectActionModeCallback.ActionHandler mActionHandler;
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     }
 
     /**
      * Sets the client to use for Contextual Search functionality.
      * @param contextualSearchClient The client to notify for Contextual Search operations.
      */
     public void setContextualSearchClient(ContextualSearchClient contextualSearchClient) {
         mContextualSearchClient = contextualSearchClient;
     }
 
+    @CalledByNative
+    private long getLocationOnScreen() {
+        // TODO(yukawa): ViewPositionObserver has similar logic. Try to merge them.
+        mContainerView.getLocationInWindow(mGetLocationOnScreenBuffer);
+        return ((long) mGetLocationOnScreenBuffer[0]) << 32 | mGetLocationOnScreenBuffer[1];
+    }
+
     private native WebContents nativeGetWebContentsAndroid(long nativeContentViewCoreImpl);
 
     private native void nativeOnJavaContentViewCoreDestroyed(long nativeContentViewCoreImpl);
 
     private native void nativeSetFocus(long nativeContentViewCoreImpl, boolean focused);
 
     private native void nativeSendOrientationChangeEvent(
             long nativeContentViewCoreImpl, int orientation);
 
     // All touch events (including flings, scrolls etc) accept coordinates in physical pixels.
@@ skipping 86 matching lines @@
     private native void nativeWasResized(long nativeContentViewCoreImpl);
 
     private native void nativeSetAccessibilityEnabled(
             long nativeContentViewCoreImpl, boolean enabled);
 
     private native void nativeExtractSmartClipData(long nativeContentViewCoreImpl,
             int x, int y, int w, int h);
 
     private native void nativeSetBackgroundOpaque(long nativeContentViewCoreImpl, boolean opaque);
 }